当物体受到平衡力作用时,下列情况不可能的是( ) A.重力势能可能减小 B.重力 发布时间:2017-07-20 00:49 │ 来源:www.tikuol.com 题型:选择题 问题: 当物体受到平衡力作用时,下列情况不可能的是( )A.重力势能可能减小B.重力势能可能增加C.动能可能增大D.动能和重力势能都不变
题型:选择题 It is exactly ______he often fails in the exam ______ makes his parents worried about him.A.what; thatB.that; whichC.that; thatD.what; what 查看答案
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