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【单选题】
对于电压放大器来说, 越大,电路的放大能力越强。A.
输出电阻
B.
电压放大倍数
C.
输入电阻
D.
信号源内阻
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举一反三
【单选题】.No sooner____to shine____it clouded over again.
A.
the sun had started;than
B.
had the sun started;than
C.
the sun started;when
D.
did the sun started;when
【单选题】They had no sooner arrived at the airport ________ it was time to check in. [ ]
A.
when
B.
before
C.
than
D.
though
【单选题】Which of the following contains an adverbial clause of time?
A.
No sooner had I got home than it began to rain.
B.
I do remember, now that you mention it.
C.
You'll be late unless you hurry.
D.
Much as I'd like to, I can't come.
【单选题】No sooner _______ the competition _______ _______ an unexpected accident happened.
A.
did … begin; than
B.
had … begun; when
C.
did … begin; when
D.
had … begun; than
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