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Tom used to be very shy, but this time he was bold enough to give a performance in front of a large audience.

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Part II. WritingDirections: Write an essay on the following topic. The topic has an outline you can followTopic: Learning English by Repetition1.Introduction:repetition: an effective method of learning English2. Reasons for repetition1)helpful to remember new words2)beneficial to our reading, listening and writing3.Conclusion

某对称三角形连接负载线电流为1.732A，则每相负载电流为（）

A. 1.732A
B. 2A
C. 1A

并联在某相负载两端的电压表，测得的电压是（）

A. 相电压
B. 线电压
C. 相电流

对称负载星形联结时，线电流等于相电流。

A. 对
B. 错