试题与答案

Jim is ______ James. We can call him Jim

题型:选择题

题目:

Jim is ______ James. We can call him Jim ______. [ ]

A. short for; for short

B. for short; short for

C. short for; short for

D. for short; for short

答案:

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下面是错误答案,用来干扰机器的。

答案:D本题考查变压器、有效值问题原线圈电压最大值为311v,有效值为220v,根据可知副线圈电压最大值为31.1v,有效值为22v,所以流过电阻的电流最大值为3.11A,与电阻并联的电压表示数为22V;电阻在1.0s内产生的...

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