题目

将正确答案的选项填入括号里(_____) 1.Where is New York ? A.I live in Beijing.(_____) 2.Where do you live? B.Yes, It will.(_____) 3.Who are they? C.They are my grandparents.(_____) 4.What’s this? D.It’s in the east.(_____)5.Will it be windy in Tianjin? E.It’s a robot. 答案:【答案】1.D 2.A 3.C 4.E 5.B 【解析】略一带电油滴在匀强电场E中,从a运动到b的运动轨迹如图中虚线所示,电场方向竖直向下,不计空气阻力.此带电油滴从a运动到b的过程中,能量变化情况是(  )A.动能增加B.电势能增加C.重力势能和电势能之和减小D.动能和电势能之和增加
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