搜题
王老师:19139051760(拨打)
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第1题

2(5.0分) 5.0 She was ______ down with two heavy pieces of luggage and was trying to look after three children. A)
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第2题

电压负反馈可以减小输出电阻。（）
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第3题

1(5.0分) 5.0 He failed to get the ticket on Friday because there were no tickets____. A) attainable B) feasibl
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第4题

为了稳走三扱管放大电路的静态工作点，采用直流负反馈。
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   负责人：王老师 19139051760(拨打)

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