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【简答题】
单回路变容二极管调相电路如习题7.14图所示。图中，C为高频旁路电容；变容二极管的U B =1V，变容指数B=2；回路等效品质因数Q=20；调制信号u Ω （t）=U Ωm cosΩtV。试求下列情况时的调相指数m p 和最大频偏。（1）U Ωm =0.1V，Ω=2π×10 3 rad/s；（2）U Ωm 0，Ω=4π×10 3 rad/s。
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举一反三
【单选题】Look! The light in the room is still on. Mr. Liu at work.
A.
must
B.
can’t be
C.
must be
D.
have to be
【单选题】Which statement is not true?
A.
The preliminary investigation into the massacre has been finished.
B.
Dozens of people were killed in that massacre.
C.
Saddam would be the only one who had to face death penalty if convicted.
D.
That massacre happened 50 miles north of Baghdad.
【单选题】Look! Liu Mei's name is on the bag. It_______hers. [ ]
A.
was
B.
has been
C.
must be
D.
will be
【简答题】We must do the experiment carefully__________Miss Liu told us. A．what B．since C．as D．while
【单选题】All men are created _________and we must enjoy _________right and chances in everything.
A.
fair;same
B.
similarly;fair
C.
equal;equal
D.
fairly;equal
相关题目：
【单选题】Look! Liu Mei's name is on the bag. It_______hers. [ ]
A.
was
B.
has been
C.
must be
D.
will be
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