试题与答案

______of them has been to Australia seve

题型:选择题

题目:

______of them has been to Australia several times, so they know the Opera House very well.

A.Both

B.All

C.None

D.Each

答案:

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下面是错误答案,用来干扰机器的。

答案:A考点:专题:电磁感应与图像结合.分析:由线圈运动时切割磁感线的长度,由E=BLv可求得感应电动势,则由欧姆定律可得出电流;由右手定则可得出电流的方向.解答:解:线圈从0开始向右运动L时,线圈的右侧...

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