当输入信号频率为fl或fh时，放大倍数的幅值下降为中频时的 ，或者是下降了 dB。此时与中频时相比，放大倍数的附加相移约为 。
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Why should we hold a business plan meeting?
A. To seek others’ opinions and make the former one better.
B. To conduct a marketing research.
C. To meet the related persons.
D. To discuss the financial arrangements.
What is suggested when organizing a formal business plan meeting?
A. Casual dress.
B. Dinner clothes.
C. Office dress.
D. Informal dress.
Which person is not suitable to attend the business plan meeting?
A. Decision makers.
B. Experts.
C. Implementers.
D. Customers.
If too many persons rush in to the meeting room, what should we do?
Ask them to leave.
B. Add an overflow meeting room.
C. Invite them to go to the dinner room.
D. Not mentioned.
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