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【单选题】
在射极耦合长尾式差动放大电路中,的主要作用是( )A.
提高差模增益
B.
提高共模抑制比
C.
增大差动放大电路的输入电阻
D.
减小差动放大电路的输出电阻
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【简答题】How did the man feel about his work? [ A] It was interesting but it kept him busy. [B] He doesn't like it because it is uninteresting. [C]He likes the work very much.
【单选题】Had he kept an eye on the business ,his firm ______ the crisis.
A.
must have got through
B.
would have got through
C.
would get through
D.
could get through
【简答题】In the experiment we kept a watchful eye ________ the developments and recorded every detail. A) in B) at C) for D) on
【单选题】The old man kept on studying Chairman Mao’s ___ in his ___.
A.
work . sixty
B.
novels, sixtieth
C.
works, sixties
D.
books, sixty’s
【单选题】I kept looking at the man wearing a pair of glasses, wondering ________.
A.
whether did I borrow his book
B.
where I had seen him before
C.
what I knew his wife
D.
when had I helped him
【单选题】某人将6 000元存人银行,银行的年利率为10%,按复利计算,(F/P,10%,5)=1.6105, 则5年后此人可从银行取出:
A.
9 220
B.
9 000
C.
9 950
D.
9 663
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