题目

He is not very good at getting his ideas ________, so he is easily misunderstood by others.(  ) A. over    B. along      C. across     D. about   答案:C  (2013?平凉)一些民间谚语常蕴含着丰富的物理知识,下面四句谚语中对应的物理知识正确的是(  )A.潭清疑水浅--光的反射现象B.一个巴掌拍不响--声音不能在固体中传播C.人多力量大--杠杆原理D.磨刀不误砍柴工--减小受力面积,增大压强
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