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【简答题】
某放大电路电压放大倍数Au的折线近似幅频特性如图所示。由此可知中频电压放大倍数|Aum|为____(A、60, B、1000, C、3)倍,下限截止频率为____(A、1Hz , B、10Hz, C、100Hz)上限截止频率为____(A、10kHz, B、100kHz, C、1000kHz)。当信号频率恰好等于上限截止频率或下限截止频率时,该电路的实际电压增益约为____(A、60dB, B、-3dB, C、57dB)。
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举一反三
【简答题】两个字符串分别为:S1=“Today is”,S2=“24 July,2011”,ConcatStr(S1,S2)的结果是:____。
【单选题】What is Charles Darnay's real last name?
A.
Defarge
B.
Marquis
C.
Gabelle
D.
Evremonde
【简答题】Why was Darnay arrested again after being set free?
【简答题】(7) 两个字符串分别为: S1="Today is" , S2="30 July,2005",strcat(S1,S2)的结果是: 。
【单选题】How does Doctor Manette help Darnay?
A.
He becomes the Defarges' personal physician so he can get inside information
B.
He gets himself arrested so the two can find a way to escape together.
C.
He becomes a prison doctor so he can watch out for Darnay's safety.
D.
He does favors for important revolutionaries in exchange for a promise of Darnay's safety.
【单选题】What is Charles Darnay tried for in England?
A.
murder
B.
robbery
C.
theft
D.
treason
【简答题】两个字符串分别为:S1="Today is",S2="30 July,2005",ConcatStr(S1,S2)的结果是: ( )。
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