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【简答题】
在放大电路中,若输入电压为正弦波形,用示波器观察 u o 和 u i 的波形,当放大电路为共射极电路时,则 u o 和 u i 的相位 _______ ;当为共集电极电路时,则 u o 和 u i 的相位 ______________ ;当为共基极电路时,则 u o 和 u i 的相位 _________ 。
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举一反三
【简答题】B It was 1961 and I was in the fifth grade. My marks in school were miserable and, the thing was, I didn’t know enough to really care. My older bother and I lived with Mom in a dingy multi-family hous...
【单选题】The fifth thing is _______. You should think it is a privilege for you to serve as a doctor, a lawyer, a teacher, or whatever you do. Try to serve others something of value.
A.
persistence
B.
passion
C.
ideas
D.
service
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