随着社会的发展 人们生活水平的提高,过年的习俗也悄然发生了变化:有的人

Withtheeconomicdevelopmentandsocialprogress,people'slivingstandardfurtherascension,thenthelivingenvi

芝麻开花————节节高

AsChina'ssocialandeconomicdevelopment,people'slivingstandardandhealthlevelofcontinuousimprovement,th

A

1.HotelserviceisawindowofsocialcivilizationWiththefastdevelopmentofsocialeconomyandpeople'slivinglev

Withthedevelopmentofthesocialeconomyandtheimprovementofthepeople'slivingstandard.

Pickto:nowadays,withthedevelopmentofeconomy,theprogressofthesociety,peoplelivingstandardriseceaseles

{1}由图得,有3股绳子作用在物体上所以h=3因所绳子能承受的最大拉力为250N所以250N乘以h就是能承受物体加滑轮的最大力所以F最大=250N×3=750N计算滑轮重力只计算动滑轮所以动滑轮重力=

Now,alongwiththeprogressofthesociety,people'sstandardoflivingrisesceaselessly,thenthehouseholdwastea

Assoceitygrowsandtechonogyadvances,togetherwithimprovementofpeople'livingstandard,itisconvinentforli

Withdevelopmentofthesociety,peopleareearningmoreandmore.

Sincereformandopening,withthecontinuousimprovementoflivingstandardsandsocialprogress,plasticpackagin

Withthedevelopmentofoursocialeconomy,thedeepeningofthehousingsystemreform,theimprovementofpeople'sli

很不幸,没看到图.看了你的描述,这题很简单了,课本公式直接套用,课本上还有相似的例题,不要老靠别人,自己现在都不会,以后想学会物理会很难.学物理其实很简单,得有抽象的思维,多联系联系现实,尤其这种理想

就是这个

（1）F1=1n（G物+G动）=13（600N+30N）=210N,210N＜250N,拉力没有超过绳子的最大承受力．（2）绳子绕法如下图,虽然省力,但不能改变力方向,人在高处很危险,这种方法不正确．

（d）从甲图中可知，n=我，9=dn（G动+G）=d我（我0N+600N）=8d0N；（8）将绳子固定在定滑轮上，然后将绳子绕完即可，如图所示：即n′=4，9′=dn′（G动′+G）=d4（60N+6

Withtheimproveofpeople`slifelevel,"thetimeofleisure"and"socalleisure"iscoming.再问：呵呵，下面还有一大段呢，可以继续为我解

春联是中国传统,是一种迎接新年的做法,可以重新春、迎春这方面写.或写,现在生活水平提高了,都是买春联,少有写春联的～有的直接贴都没有～···我家今年第一年贴,是贴我写的哦!

DaveeitherwatchesTVorgoesoutatnight.Arriveontimetomorrowmorning.Thereisasubwaystationbetweenmyhomean