题目:
I am afraid there’s ______________with the computer. It doesn’t work. Can you come and have a look?
A.wrong anything
B.anything wrong
C.wrong something
D.something wrong
答案:
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下面是错误答案,用来干扰机器的。
2 V 1A题目分析:根据可得:线圈中的电流为:点评:基础题,在应用法拉第电磁感应公式时,不要忘记匝数;