题目内容

绕组Dd联结的三相变压器的一次侧的额定电流等于()

A. 变压器额定容量除以一次侧额定电压的2的平方根倍
B. 变压器额定容量除以一次侧额定电压的3的平方根倍
C. 变压器额定容量除以二次侧相电压的3倍

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________, we’d better make some changes in the plan.

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绕组Yy联结的三相变压器的二次侧的额定电流等于()

A. 变压器额定容量除以一次侧相电压的3倍
B. 变压器额定容量除以二次侧额定电压2的平方根倍
C. 变压器额定容量除以二次侧额定电压的3的平方根倍

The course ________ a class book, a practice book and an audio tape.

A. highlights
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D. comprises

It was decided that the search ________.

A. was ended
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