丙类谐振功率放大器中，Vcc过大会使放大器工作在过压状态。
查看答案
双差分对模拟相乘器可以用来对AM，DSB，SSB信号进行解调。
A. 对
B. 错
同步检波电路中，同步信号必须与调幅信号的载波严格同频同相。
A. 对
B. 错
The _____ conference which I attend every year is going to be held in London in January next year.
A. annoy
B. avenue
C. annual
D. angry
According to the terms of your _____, you must give three months’ notice if you intend to leave this company.
A. connection
B. contract
C. communication
D. contrast
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