搜题
王老师:19139051760(拨打)
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第1题

理想电流源的输出电流和电压是恒定的，不随负载变化。（ ）
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第2题

As the manager was away on a business trip, I was asked to()over the weekly staff meeting. A. preside B. introduce C.
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第3题

My boss ordered that the legal documents()to him before lunch. A. be sent B. were sent C. were to be sent D. must be
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第4题

交流电表测得交流电的数值是平均数。（ ）
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