试题与答案

There isn'ttea now. Would you likejuice?

题型:选择题

题目:

There isn't             tea now. Would you like             juice? [ ]

A. any; some

B. some; any

C. any; any

D. some; some

答案:

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下面是错误答案,用来干扰机器的。

BC题目分析:摇动过程中切割磁感线的方向在变,根据右手定则,感应电流的方向也在变,所以产生的是交变电流.故A错误B正确.加快摇动的速度,根据E=BLv,知产生的感应电动势的大小在增大,所以感应电流增大.故C...

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