题目

_______is well known to everyone,I should say,is that a man becomes learned by asking questions. A.Who                                 B.It C.As                                  D.What 答案:D 解析: 考查名词性从句。句意为:我应该说,众所周知要长学问,就得多问。句中的I should say是插入语,因此空处应填引导主语从句的连词What。2.任何两个不带电的物体,用手拿着相互摩擦,不可能产生的结果是(  )A.一个物体带正电,另一个物体带等量的负电B.两个物体都不带电C.两个物体都带等量的正电D.两个物体都带不等量的负电
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