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【简答题】
负反馈放大器的开环放大倍数为A,反馈系数为F,则闭环放大倍数Af为: ,在深度负反馈的条件下,闭环放大倍数Af与反馈系数F之间的关系近似为: 。
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反馈参考答案：
举一反三
【单选题】The computer center, _______last year, is very popular among the students in this school.
A.
open
B.
opening
C.
having opened
D.
opened
【单选题】One of the basic roles of computer security is to change your((73))regularly.
A.
name
B.
computer
C.
password
D.
device
【单选题】The Internet has led to a huge increase in credit-card (信用卡) fraud. Your card information could even be for sale in an illegal Web site (网站). Web sites offering cheap goods and services should be rega...
A.
A lot of stolen credit-cards were sold on the Internet.
B.
Fraud on the Internet.
C.
Many Web sites are destroyed.
D.
Many illegal Web sites are on the Internet.
【单选题】Good shoes, clothes and a backpack are the basic ________ you need for your hiking.
A.
equipment
B.
instruments
C.
tools
D.
models
【单选题】One of the basic laws for developing your memory is to visualize everything that happens around you every day.
A.
Y
B.
N
C.
NG
【简答题】Your body needs a certain amount of energy to maintain basic 4 such as breathing,
【单选题】下列激酶复合物能推进细胞从G2期进入M期的是
A.
cyclinA +CDK1
B.
cyclinA +CDK2
C.
cyclinB+CDK1
D.
cyclinD+CDK4
E.
cyclinD+CDK6
【单选题】The most important basic law for improving your memory is to associate anything you would like to recall later.
A.
Y
B.
N
C.
NG
【单选题】根据本课程推荐的方式,以下哪句话更适合来安慰刚刚考试失利的那个TA?()
A.
没事，下一门考好就好啦
B.
这有啥，过两天不就没事啦
C.
来玩局游戏，安慰一下你受伤的小心灵
D.
这一次真得很遗憾，就差那么一点点
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