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【单选题】
调用printf和scanf函数时,必须包含的头文件是( )。A.
stdio.h
B.
stdlib.h
C.
define
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参考解析：
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【判断题】When the operating frequency is greater than the resonant frequency, the LC parallel resonant circuit and the LC series resonant circuit are both capacitive.
A.
正确
B.
错误
【简答题】series resonant
【简答题】resonant frequency
【单选题】OBLIQUE : INDIRECT ::
A.
par : standard
B.
inherent : direct
C.
resonant : equitable
D.
justified : logical
E.
circular : animated
【单选题】What can be inferred from the passage?
A.
Twitter would like to make the word 'resonant' a popular buzzword.
B.
The ads that are resonated by most users are the best ones.
C.
Twitter's 'resonant' strategy is proved to be successful.
D.
Companies may run a risk if they pay for Twitter's ads.
【多选题】How to improve the frequency stability of the Resonant Circuit?
A.
Use the inductance and capacitance with high stability
B.
Loose coupling connection between the transistor and loop
C.
Improve the value of Q of the resonant circuit
D.
Use three point oscillator structure
【简答题】For LC parallel resonant circuit, what is the port property when it’s in resonant frequency?
【单选题】Because it is tuned a fifth lower, the viola produces a sound that is more resonant than that of the violin.
A.
more vibrant
B.
more harmonious
C.
softer
D.
sadder.
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