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北京市2011—2012学年八年级物理上学期 第4章 压强与浮力目标检测试卷(无答案) 北京课改版_图文


positi on-related consum ption of civil serva nts ha s bee n swe pt by fina nce, cons umer, regardl ess of cost, extravagance and waste in t he civil service position-relate d cons umption, abuse , corr upti on a nd embe zzleme nt, corrupti on i s important . The n, under t he c onditions of market economy, how t o reform the existing civil duty cons umpti on manageme nt, expl ores a s ource to preve nt and cur b the post consumpti on corr uption way, i s currently a major is sue fac ed by honest work.

Recently, I conducte d research on this i ssue, this problem on some humble opi nions. First , the existing publ ic servants ' duty consumpti on the main pr oblems seen from the investigation and reasons, i n rece nt years, publi c serva nts ' duty consum ption caused by the abuse s and not a person of integrity, is one of the maj or problems i n the party i n Gover nment, its operation or der have a negative effect on the party and Gover nment orga ns, seri ously damagi ng the image of the party and t he Gov ernment, undermini ng the relations hip betwee n party and the mas ses, effect, ope ning up and economic constructi on. From I County in re cent years of governa nce situation see , positions consumpti on i n the produce d of "two not" phe nome non

renderi ng four a features: a i s positions consumpti on sy stem lost ha s due of binding , right is greater tha n rules , and right is greater tha n method of phenomenon more highlight ; II is i n positions consumpti on i n the Camera Obscura operation, usi ng terms, will positi ons cons umption into has personal consumpti on, will corporate poi nts to int o pers onal poi nts to, makes positi ons cons umption in s ome as pects has int o positions e njoy a nd s elf-deali ng of means ; three i s to positions consumpti on for name, fraud, false impersonator, Trend of negative corr upti on phe nome na such a s corr upti on a nd misappropriati on; four pala ces , follow the fashion, rivalries, w a steful, and post cons umpti on became a symbol of s howi ng off their individual ca pacitie s. Ca use d by publi c servant s ' duty con sumpti on of many "two" phenomenon i n whi ch people reflect the biggest probl ems are: (a) the official ca r problems . Mai nly in three a spe cts: one i s the larger buse s cost expenditure . Accordi ng to statistics, until November 20 03, XX County town shi p Departme nt bus 159 cars, w hich de partment ow ns the bus 145 ve hicle s, and showe d an increasi ng trend. Fina nci al expe nses cost per bus per year t o 35, 000 yua n, and in fact every cost up to 50, 000

yuan. S ome unit s also hiring temporary drivers a nd expenditure on wages a nd s ubsidie s. Ne ces sary to "keep a car", but als o "de pendants", lea ding to larger ex penses. Se cond, gongchesiy ong bree d unhe althy tendencies. S ome pe ople believe t hat now some bus drivers use one-t hird, one -thir d lea ding private one -third use d for official purposes . Some publi c serva nts, es pecia lly leadi ng officials mot oring, cars for private purposes , violating t he self -dis cipli ne regulati ons, and even lea d to traffic acci dent s. Accordi ng to statisti cs from related de partments , since 200 4, the corre ct investigation in our County serves nearly 30 car s for private purposes, only the first half of this year, cars for private purposes or

压强与浮力

一.单选题

1.在国际单位制中,压强的单位是( )

A.牛 B.帕

C. 千克

D.千克/米 3

2.关于压力,下列说法正确的是( )

A. 压力是由于物体的重力产生的,所以压力的方向总与重力的方向相同

B. 压力的大小总等于物重

C. 压力的大小有时等于物重

D. 竖直作用在物体表面上的力叫压力

3.关于压强,下列说法正确的是( )

A.压强可以比较压力产生的效果

B. 压力越大,产生的压强也越大

C. 受力面积越小,产生的压强越大

D.以上说法都不对

4.以下措施中,能增大压强的是( )

A.把铁轨放在枕木上

B. 切菜的刀刃磨得很薄 C.自行车的座子制成凹形 D.拖拉机安装履带

5.首先测出大气压值的科学家是( )

A.伽利略 B.牛顿

C. 托里拆利

D.奥托·格里克

6.当盛水的试管逐渐倾斜时(水不外流),水对管底的压强( )

A.逐渐变小

B. 逐渐变大

C. 始终不变

D.无法判断

7.潜水艇从水下 100m 处上浮的过程中(露出水面前),海水对它的( )

A.压强增大,浮力增大 B. 压强减小增大,浮力不变 C. 压强、浮力都不变 D. 压强减小,浮力减小

8..已知铁的密度小于铜的密度,把质量相同的铁块和铜块没入水中,它们所受浮力( )

A.铜块的大

B. 铁块的大

C. 一样大

D.无法判断

9.一块冰漂浮在水面上,当冰块全部融化时,杯内的水面将( )A.上升 B. 下降 C. 不变 D.无法判断

10.三个高度相同分别用铅、铜、铝做成的圆柱体,竖直放在水平桌面上,对桌面的压强是( )(ρ铅>ρ铜>ρ铝)

A.铅最大

B. 铜最大

C. 铝最大

D.一样大

11.如图 4—21 所示,将同一物体放在不同的液体中,比较它们受浮力的大小,则浮力最小的是( )

A. 图甲

B. 图乙

C. 图丙

D.无法判断

leaders drivi ng a vehi cle a cci dent ca use d by roa d accide nts, 1, 1 pe ople kill ed and dire ct economic losse s amounting to more t han 1 00,00 0 yua n. Thir d, hig h efficiency and l ow cost of the bus. Surveys show that, the operati ng costs of taxis for the 820 0/... Is a fundame ntal pri ority of the reform, it is a difficult problem that must be solved in t he reform process . Clearl y, the post consumpti on averages t hree year s before as a ba se and fine -tuned on the basis of this si ngle pra ctices m ust be impr oved. Improveme nts to adhere to t hree pri nci ples: first, under the existing poli cy provi sions a pprove d for publi c servant s ' duty consumpti on sta ndar ds, calibrati on, is not contrary to poli cy. Se cond, a ccordi ng to the l ocal fina nci al situati on a nd people's s ustainabilit y, publi c servant s ' duty consumpti on sta ndar ds approve d, both fina ncial rea ch, a nd people pa ssi ng through. T hird, a ccordi ng to the operational needs of civil serva nts res ponsi ble for aut horize d publi c servant s ' duty consumpti on sta ndar ds, both high a nd low positions, but als o the nature of the w ork and the w orkloa d.

In reform of method Shang, a pprove d civil servants positions cons umption standard t o "big unifie d, and small dis persed" s uitabl e, that most positi ons

consumpti on proje ct shoul d accor ding to poli cy provi des propose d unified standard, consi der to ranks , and units a nd t he work task of differences sex, unified of standard s hould has ela stic of and dy namic of, makes regions, a nd units in im plementation unified sta ndar d Shi ha s must of flexible disposal right; but si nce set of standard must after fina ncial, a nd a udit, sect or audit a ppr oved H ou to im plementation. (C) reform package. Public s ervants ' duty cons umption elasti city of cons umption to limit cons umption, tur ning mess i nto kitchen after di nne r, follow the civ il servant wit h a how to us e personal title s ubsi dies , or how to manag e a pers onal duty consumpti on use of s ubs idies . Therefore , we must esta blis h and perfect wit h public servants ' duty cons umpti on monetization reform support of the serie s of governa nce systems s uch as the civil servi ce examination of res ponsi bility, sy s tem, low fault investigation system, the re port sai d. While other meas ure s to kee p up.

Discipli ne inspe ction and supervisi on organs, financial, auditing departme nts shoul d strengt hen supervisi on and inspe ction of publi c servants ' duty consumpti on monetizati on reform progre ss, to stre ngt hen the reform of publ ic serva nts ' d uty

consumpti on monetizati on system, measures to develop and monitor the impl ementation of ins pe ction, not consum ption as required, eve n s hifting cons umer be havior to st op, s erious ca ses to deal with. Three i deas, public servants ' duty cons umption monetization reform of politi cs, the economy and the dee peni ng of the reform, publi c serva nts ' duty consumpti on a s somew here betwee n a reform also demonstrated its importa nce a nd urgency. First of all, civil s ervants es pe cially party and G overnment lea ders a nd public serva nts ' duty cons umption there are big drawbacks . NPC de putie s and CPPCC member s and t he br oad mass es are concerne d about. Se condly, the

positi on-related consum ption of civil serva nts ha s bee n swe pt by fina nce, cons umer, regardl ess of cost, extravagance and waste in t he civil service position-relate d cons umption, abuse , corr upti on a nd embe zzleme nt, corrupti on i s important . The n, under t he c onditions of market economy, how t o reform the existing civil duty cons umpti on manageme nt, expl ores a s ource to preve nt and cur b the post consumpti on corr uption way, i s currently a major is sue faced by honest work.

Recently, I conducte d research on this i ssue, this problem on some humble opi nions. First , the existing publ ic servants ' duty consumpti on the main pr oblems seen from the investigation and reasons, i n rece nt years, publi c serva nts ' duty consum ption caused by the abuse s and not a person of integrity, is one of the maj or problems i n the party i n Gover nment, its operation or der have a negative effect on the party and Gover nment orga ns, seri ously damagi ng the image of the party and t he Gov ernment, undermini ng the relations hip betwee n party and t he mas ses, effect, ope ning up and economic constructi on. From I County in re cent years of governa nce situation see , positions consumpti on i n the produce d of "two not" phe nome non

renderi ng four a features: a i s positions consumpti on sy stem lost ha s due of binding , right is greater tha n rules , and right is greater tha n method of phenomenon more highlight ; II is i n positions consumpti on i n the Camera Obscura operation, usi ng terms, will positi ons cons umption into has personal consumpti on, will corporate poi nts to int o pers onal poi nts to, makes positi ons cons umption in s ome as pects has int o positions e njoy a nd s elf -deali ng of means ; three i s to positions consumpti on for name, fraud, false impersonator, Trend of negative corr upti on phe nome na such a s corr upti on a n d misappropriati on; four pala ces , follow the fashion, rivalries, w asteful, and post cons umpti on became a symbol of s howi ng of f their individual ca pacitie s. Ca use d by publi c servant s ' duty consumpti on of many "two" phenomenon i n whi ch people reflect the biggest probl ems are: (a) the official ca r problems . Mai nly in three a spe cts: one i s the larger buse s cost expenditure . Accordi ng to statistics, until November 20 03, XX County town shi p Departme nt bus 159 cars, w hich de partment ow ns the bus 145 ve hicle s, and showe d an increasi ng trend. Fina nci al expe nses cost per bus per year t o 35, 000 yua n, and in fact every cost up to 50, 000

yuan. S ome unit s also hiring temporary drivers a nd expenditure on wages a nd s ubsidie s. Ne ces sary to "keep a car", but als o "de pendants", lea ding to larger ex penses. Se cond, gongchesiy ong bree d unhe althy tendencies. S ome pe ople believe t hat now some bus drivers u se one-t hird, one -thir d lea ding private one -third use d for official purposes . Some publi c serva nts, es pecia lly leadi ng officials mot oring, cars for private purposes , violating t he self-dis cipli ne regulati ons, and even lea d to traffic acci dent s. Accordi ng to statisti cs from related de partments , since 200 4, the corre ct investigation in our County serves nearly 30 car s for private purposes, only the first half of this year, cars for private purposes or

12.圆柱体 A、B 高度相等,底面积之比为 4:1。把它们竖直放在水平地面上,它们对地面的压强之比为 1:2。若

把圆柱体 A 叠放在圆柱体 B 上时,圆柱体 B 对地面的压强增大为原来的( )

A.4 倍

B. 3 倍

C. 2 倍

D. 8 倍

二.多选题

13.如图 4—22 所示,将甲、乙两个完全相同的圆台状容器里装满水,水对容器底的压强分别为 P 甲和 P 乙,水对

容器底的压力分别为 F 甲和 F 乙。则以下判断正确的是( )

A. P 甲<P 乙

B. P 甲=P 乙

C. F 甲=F 乙

D. F 甲>F 乙

14.把一个均匀木块分别放在三种不同的液体中,木块浸入液体里的情况如图 4—23 所示,则( )

A.木块在甲中受的浮力大

B. 木块在三种液体中受的浮力一样大

C. 甲中液体的密度最大

D. 丙中液体的密度最大

三.填空题

1.如图 4—24 所示,将一块重 10N 的物块用 F=2N 的力压在竖直的墙壁上,则墙受到的压力是

N。

2.在 0.02m2 的物体表面上,受到压力是

时,物体表面受到的压强是 200Pa。

3.一块砖长 20cm,宽 10cm,高 5cm,质量是 1.5Kg。把它以不同的三种方式放在水平地面上,它对地面的最小压

强是

Pa,最大压强是

Pa。两种情况下对地面的压力之比是



4.把甲、乙两种液体分别倒入相同的量筒中,已知甲液体的深度为 h,乙液体的深度为 2h,两种液体的质量之比

为 2:3,则它们的密度之比为

,对量筒底部压强之比为



5. 将 一 物 块 挂 在 弹 簧 测 力 计 上 , 然 后 将 物 块 浸 没 于 某 种 液 体 中 , 当 物 块 静 止 时 , 物 块 受 到 的 力

leaders drivi ng a vehi cle a cci dent ca use d by roa d accide nts, 1, 1 pe ople kill ed and dire ct economic losse s amounting to more t han 1 00,00 0 yua n. Thir d, hig h efficiency and l ow cost of the bus. Surveys show that, the operati ng costs of taxis for the 820 0/... Is a fundame ntal pri orit y of the reform, it is a difficult problem that must be solved in t he reform process . Clearl y, the post consumpti on averages t hree years before as a ba se and fine -tuned on the basis of this si ngle pra ctices m ust be impr oved. Improveme nts to adhere to t hree pri nci ples: first, under the ex isting poli cy provi sions a pprove d for publi c servant s ' duty consumpti on sta ndar ds, calibrati on, is not contrary to poli cy. Se cond, a ccordi ng to the l ocal fina nci al situati on a nd people's s ustainabilit y, publi c servant s ' dut y consumpti on sta ndar ds approve d, both fina ncial rea ch, a nd people pa ssi ng through. T hird, a ccordi ng to the operational needs of civil serva nts res ponsi ble for aut horize d publi c servant s ' duty consumpti on sta ndar ds, both high a nd low positions, but als o the nature of the w ork and the w orkloa d.

In reform of method Shang, a pprove d civil servants positions cons umption standard t o "big unifie d, and small dis persed" s uitabl e, that most positi ons

consumpti on proje ct shoul d accor ding to poli cy provi des propose d unified standard, consi der to ranks , and units a nd t he work task of differences sex, unified of standard s hould has ela stic of and dy namic of, makes regions, a nd units in im plementation unified sta ndar d Shi ha s must of flexible disposal right; but si nce set of standard must after fina ncial, a nd a udit, sect or audit a ppr oved H ou to im plementation. (C) reform package. Public s erv ants ' duty cons umption elasti city of cons umption to limit cons umption, tur ning mess i nto kitchen after di nne r, follow the civ il servant wit h a how to us e personal title s ubsi dies , or how to manag e a pers onal duty consumpti on use of s ubs idies . Therefore , we must esta blis h and perfect wit h public servants ' duty cons umpti on monetization reform support of the serie s of governa nce systems s uch as the civil servi ce examination of res ponsi bility, sy s tem, low fault investigation system, the re port sai d. While ot her meas ures to kee p up.

Discipli ne inspe ction and supervisi on organs, financial, auditing departme nts shoul d strengt hen supervisi on and inspe ction of publi c servants ' duty consumpti on monetizati on reform progre ss, to stre ngt hen the reform of publ ic serva nts ' duty

2
consumpti on monetizati on system, measures to develop and monitor the impl ementation of ins pe ction, not consum ption as required, eve n s hifting cons umer be havior to st op, s erious ca ses to deal with. Three i deas, public servants ' duty cons umption monetization reform of politi cs, the economy and the dee peni ng of the reform, publi c serva nts ' duty consumpti on a s somew here betwee n a reform also demonstrated its importa nce a nd urgency. First of all, civil s ervants es pe cially party and G overnment lea ders a nd public serva nts ' duty cons umption there are big drawbacks . NPC de putie s and CPPCC member s and t he br oad mass es are concerne d about. Se condly, the

positi on-related consum ption of civil serva nts ha s bee n swe pt by fina nce, cons umer, regardl ess of cost, extravagance and waste in t he civil service position-relate d cons umption, abuse , corr upti on a nd embe zzleme nt, corrupti on i s important . The n, under t he c onditions of market economy, how t o reform the existing civil duty cons umpti on manageme nt, expl ores a s ource to preve nt and cur b the post consumpti on corr uption way, i s currently a major is sue faced by honest work.

Recently, I conducte d research on this i ssue, this problem on some humble opi nions. First , the existing publ ic servants ' duty consumpti on the main pr oblems seen from the investigation and reasons, i n rece nt years, publi c serva nts ' duty consum ption caused by the abuse s and not a person of integrity, is one of the maj or problems i n the party i n Gover nment, its operation or der have a negative effect on the party and Gover nment orga ns, seri ously damagi ng the image of the party and t he Gov ernment, undermini ng the relations hip betwee n party and the mas ses, effect, ope ning up and economic constructi on. From I County in re cent years of governa nce situation see , positions consumpti on i n the produce d of "two not" phe nome non

renderi ng four a features: a i s positions consumpti on sy stem lost ha s due of binding , right is greater tha n rules , and right is greater tha n method of phenomenon more highlight ; II is i n positions consumpti on i n the Camera Obscura operation, usi ng terms, will positi ons cons umption into has personal consumpti on, will corporate poi nts to int o pers onal poi nts to, makes positi ons cons umption in s ome as pects has int o positions e njoy a nd s elf-deali ng of means ; three i s to positions consumpti on for name, fraud, false impersonator, Trend of negative corr upti on phe nome na such a s corr upti on a nd misappropriati on; four pala ces , follow the fashion, rivalries, w asteful, and post cons umpti on became a symbol of s howi ng off their individual ca pacitie s. Ca use d by publi c servant s ' duty consumpti on of many "two" phenomenon i n whi ch people reflect the biggest probl ems are: (a) the official ca r problems . Mai nly in three a spe cts: one i s the larger buse s cost expenditure . Accordi ng to statistics, until November 20 03, XX County town shi p Departme nt bus 159 cars, w hich de partment ow ns the bus 145 ve hicle s, and showe d an increasi ng trend. Fina nci al expe nses cost per bus per year t o 35, 000 yua n, and in fact every cost up to 50, 000

yuan. S ome unit s also hiring temporary drivers a nd expenditure on wages a nd s ubsidie s. Ne ces sary to "keep a car", but als o "de pendants", lea ding to larger ex penses. Se cond, gongchesiy ong bree d unhe althy tendencies. S ome pe ople believe t hat now some bus drivers use one-t hird, one -thir d lea ding private one -third use d for official purposes . Some publi c serva nts, es pecia lly leadi ng officials mot oring, cars for private purposes , violating t he self-dis cipli ne regulati ons, and even lea d to traffic acci dent s. Accordi ng to statisti cs from related de partments , since 200 4, the corre ct investigation in our County serves nearly 30 car s for private purposes, only the first half of this year, cars for private purposes or







。这三个力的合力等于



6.浸没在液体中的物体同时受到

力和

力的作用,当

时,物体下沉;当

时,物体可以悬浮于液体中。 7.将密度为 2.7×103Kg/m3、体积为 5×10-3m3 的圆柱形铝块,悬挂在弹簧测力计的下面,将铝块浸没在水中时,

上表面受到水的压力是 240N,下表面受到水的压力是 289N,此时铝块受到的浮力是

N,弹簧测力计的

示数是

N。如果铝块脱离弹簧测力计的挂钩,它在水中将

,这是因





8.有两个用不同材料做成的同体积的小球,放在同种液体中,甲球有 1/4 的体积露出液面,乙球有 2/3 的体积浸

没在液体中,则甲、乙两球的密度之比是



四.实验题

1.次数 1 2 3 4 5 6

液体 水 水 水
酒精 酒精 酒精

液体深度/h 10 20 30 10 20 30

液体内部压强/Pa 0.98×103 1.96×103 2.94×103 0.78×103 1.56×103 2.34×103

某同学使用水和酒精做“研究液体内部压强规律”的实验,实验记录的数据如上表。

(1)分析表中 1、2、3 或 4、5、6 次的实验数据可以看出



(2)对比表中 1、4 两次实验数据可以看出



2.为了探究压力作用效果与哪些因素有关,某同学用若干个同种材料制成的不同物体,放在同一水平细沙面上,进

行了三组实验,并记录有关数据分别如表 1、表 2、表 3 所示,实验时,他仔细观察沙面的凹陷程度,并通过比

较,发现每一组沙面的凹陷程度相同,而各组却不同,第一组凹陷程度最大,第二组其次,第三组最小。

表1

实验序号 1 2 3

压力(N) 6.0 9.0 1.2

受力面积(cm2) 10 15 20

表2

leaders drivi ng a vehi cle a cci dent ca use d by roa d accide nts, 1, 1 pe ople kill ed and dire ct economic losse s amounting to more t han 1 00,00 0 yua n. Thir d, hig h efficiency and l ow cost of the bus. Surveys show that, the operati ng costs of taxis for the 820 0/... Is a fundame ntal pri ority of the reform, it is a difficult problem that must be solved in t he reform process . Clearl y, the post consumpti on averages t hree years before as a ba se and fine -tuned on the basis of this si ngle pra ctices m ust be impr oved. Improveme nts to adhere to t hree pri nci ples: first, under the existing poli cy provi sions a pprove d for publi c servant s ' duty consumpti on sta ndar ds, calibrati on, is not contrary to poli cy. Se cond, a ccordi ng to the l ocal fina nci al situati on a nd people's s ustain abilit y, publi c servant s ' duty consumpti on sta ndar ds approve d, both fina ncial rea ch, a nd people pa ssi ng through. T hird, a ccordi ng to the operational needs of civil serva nts res ponsi ble for aut horize d publi c servant s ' duty consumpti on sta ndar ds, both high a nd low positions, but als o the nature of the w ork and the w orkloa d.

In reform of method Shang, a pprove d civil servants positions cons umption standard t o "big unifie d, and small dis persed" s uitabl e, that most positi ons

consumpti on proje ct shoul d accor ding to poli cy provi des propose d unified standard, consi der to ranks , and units a nd t he work task of differences sex, unified of stan dard s hould has ela stic of and dy namic of, makes regions, a nd units in im plementation unified sta ndar d Shi ha s must of flexible disposal right; but si nce set of standard must after fina ncial, a nd a udit, sect or audit a ppr oved H ou to im plementation. (C) ref orm package. Public s ervants ' duty cons umption elasti city of cons umption to limit cons umption, tur ning mess i nto kitchen aft er di nne r, follow the civ il servant wit h a how to us e personal title s ubsi dies , or how to manag e a pers onal duty consumpti on use of s ubs idies . Therefore , we must esta blis h and perfect wit h public servants ' duty cons umpti on monetization reform support of the serie s of governa nce systems s uch as the civil servi ce examination of res ponsi bility, sy s tem, low fault investigation system, the re port sai d. While other meas ures to kee p up.

Discipli ne inspe ction and supervisi on organs, financial, auditing departme nts sh oul d strengt hen supervisi on and inspe ction of publi c servants ' duty consumpti on monetizati on reform progre ss, to stre ngt hen the reform of publ ic serva nts ' duty

5
consumpti on monetizati on system, measures to develop and monitor the impl ementation of ins pe ct ion, not consum ption as required, eve n s hifting cons umer be havior to st op, s erious ca ses to deal with. Three i deas, public servants ' duty cons umption monetization reform of politi cs, the economy and the dee peni ng of the reform, publi c serva nts ' dut y consumpti on a s somew here betwee n a reform also demonstrated its importa nce a nd urgency. First of all, civil s ervants es pe cially party and G overnment lea ders a nd public serva nts ' duty cons umption there are big drawbacks . NPC de putie s and CPPCC member s and t he br oad mass es are concerne d about. Se condly, the

positi on-related consum ption of civil serva nts ha s bee n swe pt by fina nce, cons umer, regardl ess of cost, extravagance and waste in t he civil service position-relate d cons umption, abuse , corr upti on a nd embe zzleme nt, corrupti on i s important . The n, under t he c onditions of market economy, how t o reform the existing civil duty cons umpti on manageme nt, expl ores a s ource to preve nt and cur b the post consumpti on corr uption way, i s currently a major is sue faced by honest work.

Recently, I conducte d research on this i ssue, this problem on some humble opi nions. First , the existing publ ic servants ' duty consumpti on the main pr oblems seen from the investigation and reasons, i n rece nt years, publi c serva nts ' duty consum ption caused by the abuse s and not a person of integrity, is one of the maj or problems i n the party i n Gover nment, its operation or der have a negative effect on the party and Gover nment orga ns, seri ously damagi ng the image of the party and t he Gov ernment, undermini ng the relations hip betwee n party and t he mas ses, effect, ope ning up and economic constructi on. From I County in re cent years of governa nce situation see , positions consumpti on i n the produce d of "two not" phe nome non

renderi ng four a features: a i s positions consumpti on sy stem lost ha s due of binding , right is greater tha n rules , and right is greater tha n method of phenomenon more highlight ; II is i n positions consumpti on i n the Camera Obscura operation, usi ng terms, will positi ons cons umption into has personal consumpti on, will corporate poi nts to int o pers onal poi nts to, makes positi ons cons umption in s ome as pects has int o positions e njoy a nd s elf -deali ng of means ; three i s to positions consumpti on for name, fraud, false impersonator, Trend of negative corr upti on phe nome na such a s corr upti on a n d misappropriati on; four pala ces , follow the fashion, rivalries, w asteful, and post cons umpti on became a symbol of s howi ng of f their individual ca pacitie s. Ca use d by publi c servant s ' duty consumpti on of many "two" phenomenon i n whi ch people reflect the biggest probl ems are: (a) the official ca r problems . Mai nly in three a spe cts: one i s the larger buse s cost expenditure . Accordi ng to statistics, until November 20 03, XX County town shi p Departme nt bus 159 cars, w hich de partment ow ns the bus 145 ve hicle s, and showe d an increasi ng trend. Fina nci al expe nses cost per bus per year t o 35, 000 yua n, and in fact every cost up to 50, 000

yuan. S ome unit s also hiring temporary drivers a nd expenditure on wages a nd s ubsidie s. Ne ces sary to "keep a car", but als o "de pendants", lea ding to larger ex penses. Se cond, gongchesiy ong bree d unhe althy tendencies. S ome pe ople believe t hat now some bus drivers u se one-t hird, one -thir d lea ding private one -third use d for official purposes . Some publi c serva nts, es pecia lly leadi ng officials mot oring, cars for private purposes , violating t he self-dis cipli ne regulati ons, and even lea d to traffic acci dent s. Accordi ng to statisti cs from related de partments , since 200 4, the corre ct investigation in our County serves nearly 30 car s for private purposes, only the first half of this year, cars for private purposes or

实验序号

压力(N)

受力面积(cm2)

4

3.0

10

5

4.5

15

6 表3
实验序号 7 8 9

6.0
压力(N) 3.0 4.5 6.0

20
受力面积(cm2) 20 30 40

(1) 分 析 比 较 实 验 序 号 1 与 4 ( 或 2 与 5 , 3 与 6 ) 及 观 察 到 的 现 象 可 得 出 的 初 步 结 论

是:



(2) 分析比较

及观察到的现象,可得出的初步结论是:当压力相同时,受力面

积越小,压力作用效果越明显。

(3) 进一步综合分析比较表 1、表 2、表 3 中的数据及观察到的现象并归纳得出结论:

(a)分析比较



(b)分析比较



3.图 4—25 所示是小明在学习浮力时,在课上做的几个探究性实验的主要操作情景。请问:

(1)图甲的两个对比性实验,是为了探究浮力的大小与

是否有关。

(2)从图乙的两个对比性实验中,你能得到的结论是



(3)图丙是小明为了探究部分浸入液体中的物体受到的浮力大小是否符合阿基米德原理的结论而进行的几次

实验,他每次操作的目的均用文字写在了操作图的下方。根据图示情况分析,小明的操作是否恰当,为

什么?





分别读取铝柱 测 量 用空杯承 用 弹 簧 秤 在空气中和部 空 烧 接从溢水 测 出 承 接

分浸在水中时 弹图簧4-秤25的读数

杯 受 杯里排开 了 水 后 杯

到 的丙 的水

子的总重

重力

leaders drivi ng a vehi cle a cci dent ca use d by roa d accide nts, 1, 1 pe ople kill ed and dire ct economic losse s amounting to more t han 1 00,00 0 yua n. Thir d, hig h efficiency and l ow cost of the bus. Surveys show that, the operati ng costs of taxis for the 820 0/... Is a fundame ntal pri orit y of the reform, it is a difficult problem that must be solved in t he reform process . Clearl y, the post consumpti on averages t hree years before as a ba se and fine -tuned on the basis of this si ngle pra ctices m ust be impr oved. Improveme nts to adhere to t hree pri nci ples: first, under the ex isting poli cy provi sions a pprove d for publi c servant s ' duty consumpti on sta ndar ds, calibrati on, is not contrary to poli cy. Se cond, a ccordi ng to the l ocal fina nci al situati on a nd people's s ustainabilit y, publi c servant s ' dut y consumpti on sta ndar ds approve d, both fina ncial rea ch, a nd people pa ssi ng through. T hird, a ccordi ng to the operational needs of civil serva nts res ponsi ble for aut horize d publi c servant s ' duty consumpti on sta ndar ds, both high a nd low positions, but als o the nature of the w ork and the w orkloa d.

In reform of method Shang, a pprove d civil servants positions cons umption standard t o "big unifie d, and small dis persed" s uitabl e, that most positi ons

consumpti on proje ct shoul d accor ding to poli cy provi des propose d unified standard, consi der to ranks , and units a nd t he work task of differences sex, unified of standard s hould has ela stic of and dy namic of, makes regions, a nd units in im plementation unified sta ndar d Shi ha s must of flexible disposal right; but si nce set of standard must after fina ncial, a nd a udit, sect or audit a ppr oved H ou to im plementation. (C) reform package. Public s erv ants ' duty cons umption elasti city of cons umption to limit cons umption, tur ning mess i nto kitchen after di nne r, follow the civ il servant wit h a how to us e personal title s ubsi dies , or how to manag e a pers onal duty consumpti on use of s ubs idies . Therefore , we must esta blis h and perfect wit h public servants ' duty cons umpti on monetization reform support of the serie s of governa nce systems s uch as the civil servi ce examination of res ponsi bility, sy s tem, low fault investigation system, the re port sai d. While ot her meas ures to kee p up.

Discipli ne inspe ction and supervisi on organs, financial, auditing departme nts shoul d strengt hen supervisi on and inspe ction of publi c servants ' duty consumpti on monetizati on reform progre ss, to stre ngt hen the reform of publ ic serva nts ' duty

2
consumpti on monetizati on system, measures to develop and monitor the impl ementation of ins pe ction, not consum ption as required, eve n s hifting cons umer be havior to st op, s erious ca ses to deal with. Three i deas, public servants ' duty cons umption monetization reform of politi cs, the economy and the dee peni ng of the reform, publi c serva nts ' duty consumpti on a s somew here betwee n a reform also demonstrated its importa nce a nd urgency. First of all, civil s ervants es pe cially party and G overnment lea ders a nd public serva nts ' duty cons umption there are big drawbacks . NPC de putie s and CPPCC member s and t he br oad mass es are concerne d about. Se condly, the

positi on-related consum ption of civil serva nts ha s bee n swe pt by fina nce, cons umer, regardl ess of cost, extravagance and waste in t he civil service position-relate d cons umption, abuse , corr upti on a nd embe zzleme nt, corrupti on i s important . The n, under t he c onditions of market economy, how t o reform the existing civil duty cons umpti on manageme nt, expl ores a s ource to preve nt and cur b the post consumpti on corr uption way, i s currently a major is sue faced by honest work.

Recently, I conducte d research on this i ssue, this problem on some humble opi nions. First , the existing publ ic servants ' duty consumpti on the main pr oblems seen from the investigation and reasons, i n rece nt years, publi c serva nts ' duty consum ption caused by the abuse s and not a person of integrity, is one of the maj or problems i n the party i n Gover nment, its operation or der have a negative effect on the party and Gover nment orga ns, seri ously damagi ng the image of the party and t he Gov ernment, undermini ng the relations hip betwee n party and the mas ses, effect, ope ning up and economic constructi on. From I County in re cent years of governa nce situation see , positions consumpti on i n the produce d of "two not" phe nome non

renderi ng four a features: a i s positions consumpti on sy stem lost ha s due of binding , right is greater tha n rules , and right is greater tha n method of phenomenon more highlight ; II is i n positions consumpti on i n the Camera Obscura operation, usi ng terms, will positi ons cons umption into has personal consumpti on, will corporate poi nts to int o pers onal poi nts to, makes positi ons cons umption in s ome as pects has int o positions e njoy a nd s elf-deali ng of means ; three i s to positions consumpti on for name, fraud, false impersonator, Trend of negative corr upti on phe nome na such a s corr upti on a nd misappropriati on; four pala ces , follow the fashion, rivalries, w asteful, and post cons umpti on became a symbol of s howi ng off their individual ca pacitie s. Ca use d by publi c servant s ' duty consumpti on of many "two" phenomenon i n whi ch people reflect the biggest probl ems are: (a) the official ca r problems . Mai nly in three a spe cts: one i s the larger buse s cost expenditure . Accordi ng to statistics, until November 20 03, XX County town shi p Departme nt bus 159 cars, w hich de partment ow ns the bus 145 ve hicle s, and showe d an increasi ng trend. Fina nci al expe nses cost per bus per year t o 35, 000 yua n, and in fact every cost up to 50, 000

yuan. S ome unit s also hiring temporary drivers a nd expenditure on wages a nd s ubsidie s. Ne ces sary to "keep a car", but als o "de pendants", lea ding to larger ex penses. Se cond, gongchesiy ong bree d unhe althy tendencies. S ome pe ople believe t hat now some bus drivers use one-t hird, one -thir d lea ding private one -third use d for official purposes . Some publi c serva nts, es pecia lly leadi ng officials mot oring, cars for private purposes , violating t he self-dis cipli ne regulati ons, and even lea d to traffic acci dent s. Accordi ng to statisti cs from related de partments , since 200 4, the corre ct investigation in our County serves nearly 30 car s for private purposes, only the first half of this year, cars for private purposes or

五.简答计算题 1.为什么利用高压气体将潜水艇水箱中的水排出,可以使深水中的潜水艇向上运动?

2.一个平底的容器,质量是 120g,底面积为 20cm2,内盛 100cm3 的某种液体,放在水平桌面上,且对桌面产生 的压强为 1000pa。求: (1) 容器连同液体的总重。 (2) 容器中液体的密度。

3.如图 4—26 所示,装有少量细沙的长直平底玻璃管漂浮于水面。玻璃管的底面积为 5×10-4m2,浸入水中的长 度是 0.1m。求: (1)玻璃管和细沙总重是多少。 (2)当向水中撒一些食盐并搅拌均匀后,玻璃管向上浮起 0.01m,此时食盐水的密度多大。

leaders drivi ng a vehi cle a cci dent ca use d by roa d accide nts, 1, 1 pe ople kill ed and dire ct economic losse s amounting to more t han 1 00,00 0 yua n. Thir d, hig h efficiency and l ow cost of the bus. Surveys show that, the operati ng costs of taxis for the 820 0/... Is a fundame ntal pri ority of the reform, it is a difficult problem that must be solved in t he reform process . Clearl y, the post consumpti on averages t hree years before as a ba se and fine -tuned on the basis of this si ngle pra ctices m ust be impr oved. Improveme nts to adhere to t hree pri nci ples: first, under the existing poli cy provi sions a pprove d for publi c servant s ' duty consumpti on sta ndar ds, calibrati on, is not contrary to poli cy. Se cond, a ccordi ng to the l ocal fina nci al situati on a nd people's s ustain abilit y, publi c servant s ' duty consumpti on sta ndar ds approve d, both fina ncial rea ch, a nd people pa ssi ng through. T hird, a ccordi ng to the operational needs of civil serva nts res ponsi ble for aut horize d publi c servant s ' duty consumpti on sta ndar ds, both high a nd low positions, but als o the nature of the w ork and the w orkloa d.

In reform of method Shang, a pprove d civil servants positions cons umption standard t o "big unifie d, and small dis persed" s uitabl e, that most positi ons

consumpti on proje ct shoul d accor ding to poli cy provi des propose d unified standard, consi der to ranks , and units a nd t he work task of differences sex, unified of stan dard s hould has ela stic of and dy namic of, makes regions, a nd units in im plementation unified sta ndar d Shi ha s must of flexible disposal right; but si nce set of standard must after fina ncial, a nd a udit, sect or audit a ppr oved H ou to im plementation. (C) ref orm package. Public s ervants ' duty cons umption elasti city of cons umption to limit cons umption, tur ning mess i nto kitchen aft er di nne r, follow the civ il servant wit h a how to us e personal title s ubsi dies , or how to manag e a pers onal duty consumpti on use of s ubs idies . Therefore , we must esta blis h and perfect wit h public servants ' duty cons umpti on monetization reform support of the serie s of governa nce systems s uch as the civil servi ce examination of res ponsi bility, sy s tem, low fault investigation system, the re port sai d. While other meas ures to kee p up.

Discipli ne inspe ction and supervisi on organs, financial, auditing departme nts sh oul d strengt hen supervisi on and inspe ction of publi c servants ' duty consumpti on monetizati on reform progre ss, to stre ngt hen the reform of publ ic serva nts ' duty

5
consumpti on monetizati on system, measures to develop and monitor the impl ementation of ins pe ct ion, not consum ption as required, eve n s hifting cons umer be havior to st op, s erious ca ses to deal with. Three i deas, public servants ' duty cons umption monetization reform of politi cs, the economy and the dee peni ng of the reform, publi c serva nts ' dut y consumpti on a s somew here betwee n a reform also demonstrated its importa nce a nd urgency. First of all, civil s ervants es pe cially party and G overnment lea ders a nd public serva nts ' duty cons umption there are big drawbacks . NPC de putie s and CPPCC member s and t he br oad mass es are concerne d about. Se condly, the



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