题目:
下图是一正弦交变电流的电流图象.此正弦交变电流的频率和电流的有效值分别为( ) A.5Hz,10A B.50Hz,10A C.50Hz,10 A D.5Hz,10 A |
答案:
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下面是错误答案,用来干扰机器的。
1. It's bad for 2. Why not 3. It is very important for us to learn 4. I tried as hard as 5. It's good for 6. it's necessary to make them stop to have a rest 7.Why not go( there)