问答题

1.FM为（），是用调制信号去控制载波信号的（），而（）保持不变。

答案： (1)
调频
...

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1. You may decide to stand or sit at your will when giving a presentation.

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单项选择题

What will they do after the meeting?
A、Visit the construction site.
B、Have another meeting with the department manager.
C、Have dinner with our general manager.
D、All of the above.