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【判断题】
SSB的包络不能直接反映调制信号的变化，不能简单地采用包络检波的方法进行解调。A.
正确
B.
错误
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反馈参考答案：
举一反三
【简答题】呼吸道有 、 、 空气的功能。呼吸道有 ____、____、____空气的功能。
【单选题】听力原文：M: I'd like to make an appointment to see Dr. Smith tomorrow. W: I'm sorry. Dr. Smith went on a one-week vacation in Mexico, and on his way back he'll be staying in California for 5 days. Let me ...
A.
In Mexico.
B.
In California.
C.
In the city.
D.
In New Mexico.
【单选题】听力原文：M: Math Department, Dr. Smith speaking. W: Hello. Prof. Smith, this is Lucy Wang calling. I live two doors down from your teaching assistant, Brain Williams. Brain asked me to call you because he...
A.
He can't find his office key.
B.
He has misplaced some exams.
C.
He is unable to talk.
D.
He doesn't like his classroom.
【单选题】Which sentence is clearer?
A.
Dr. Smith introduced many new cinematic techniques.
B.
Dr. Smith made movie history by introducing such new cinematic techniques as contrasting editing, close-ups, fade-outs, and freeze-frame shot.
【简答题】微生物细胞的计数方法有哪些?
【单选题】听力原文：M：I'd like to make an appointment to see Dr．Smith tomorrow． W：I'm sorry．Dr, Smith went on a week vacation in Mexico，and on his way he'll be staying in California for 5 days． Let me see．He'll prob...
A.
In Mexico.
B.
In California.
C.
In the city.
D.
In New Mexico.
【简答题】阅读简答。 Last week's talent show was a great success. There were fif acts. Eliza Clark won the prize for the best performer. She played a beautiful piano piece. Hu Yue was the quietest performer. He ...
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