试题与答案

物体运动过程中,重力对其做功为300J,则物体的( ) A.动能一定增加300J

题型:选择题

题目:

物体运动过程中,重力对其做功为300J,则物体的(  )

A.动能一定增加300J

B.动能一定减少300J

C.重力势能一定增加300J

D.重力势能一定减少300J

答案:

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小题1:A小题2:B小题3:C题目分析: 本文讲述作者与一位陌生的女士分享看日落的喜悦,四年后,作者处于生活的低谷,看到那位陌生女士在杂志上发表的文章,很受鼓舞。小题1:A 细节理解题。根据第三段提到When she...

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