单选题:We can learn from the last paragraph that

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  • 题目类型:单选题
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题目内容:
We can learn from the last paragraph that A.it is necessary to obtain as much knowledge as possible.
B.people should make the best use of the information.
C.we should realize the importance of accumulating information.
D.it is of vital importance to acquire needed information efficiently.

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在图8—8中所示的电场中 (  )

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I told him that I would __________ him to act for me while I

I told him that I would __________ him to act for me while I was away from offic

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一个质量为2kg的物体从5m高处自由落下碰到水泥地面上后又跳起3.2m,若向上为正方向,则小球碰地前的动量_______

一个质量为2kg的物体从5m高处自由落下碰到水泥地面上后又跳起3.2m,若向上为正方向,则小球碰地前的动量__________kg·m/s,相碰后的动量____

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