555定时器组成的单稳态触发器是在TR端加入负脉冲触发的。()
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运算放大器组成的反相比例放大电路，其反相输入端与同相输入端的电位近似相等。()
People today are more likely to admire______.
A. politicians
B. those who start their own company
C. people in their 20s and 30s
D. Fortune 500 CEOs
The best title for this text might be______.
Adventures with the Rich and Famous
B. Favors Received
C. Meet Me for Lunchatation
D. Good Times and Laughter
应聘信是在不知道用人单位是否要聘人的情况下自己向用人单位自荐谋求职位的信函文书。()
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