如图所示，三个相同的小球A、B、C，其中小球A沿高为h、倾角为θ的光滑斜面以初速度v0从顶端滑到底端，小球B以同样大小的初速度从同等高度处竖直上抛，小球C在同等高度水平抛出．则

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如图所示，三个相同的小球A、B、C，其中小球A沿高为h、倾角为θ的光滑斜面以初速度v₀从顶端滑到底端，小球B以同样大小的初速度从同等高度处竖直上抛，小球C在同等高度水平抛出．则（）

A：小球A到达地面的速度最大

B：从开始至落地，重力对它们做功相同

C：三个小球到达地面时，小球B重力的瞬时功率最大

D：从开始运动至落地过程中，重力对它们做功的平均功率一定相同

上一题下一题 0.0难度选择题更新时间:2013-01-07 09:05:42

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B,C

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The Spring 1 is the Chinese New Year .It usually comes in February . everyone in Chinese likes it very much .When it comes ,Li Lei helps his parents clean the house and do some other housework . on that day , everyone 2 dumplings and some other delicious food . Li Lei likes New Years cakes vevy much. But Lingling says jiaozi is nicer than New year’s cakes. Chinese people eat jiaozi and cakes in the house .How happy they are!
1 处的单词是：____
2处的单词是：____
画线部分翻译成为汉语：____
When does the Chinese New Year come ?____
What does Li Lei do when New Year comes ?____

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