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【单选题】
在图示放大电路中,当旁路电容 C e 开路时,电路的电压增益的绝对值和电路输入电阻 R i 将如何变化?( )A.
都增大
B.
都减小
C.
电压增益的绝对值减小， R i 增大
D.
都不变
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皮皮学刷刷变学霸
举一反三
【多选题】Task 4 Ms. White is talking with the exporter Mr. Ford about the packaging for her order. Listen to the conversation and tick off the reasons Ms. White holds against using cartons.
A.
Cartons are more expensive.
B.
Cartons are not strong enough.
C.
Cartons are not waterproof.
D.
Cartons do not appeal to the eye.
E.
Cartons are light.
F.
Cartons increase the risk of theft.
【简答题】Ms. White is talking with the exporter Mr. Ford about the packaging for her order. Listen to the conversation and tick off the reasons Ms. White holds against using cartons.
【判断题】Mr. White is talking with Wang Min. Listen to the conversation and decide whether the following statements are true(T)or false(F) 1. When the tourists arrive at the hotel, they find there are not enou...
A.
正确
B.
错误
【多选题】Ms. White is talking with the exporter Mr. Ford about the packaging for her order. Listen to the conversation and tick off the reasons Ms. White holds against using cartons.
A.
Cartons are more expensive.
B.
Cartons are not strong enough.
C.
Cartons are not waterproof.
D.
Cartons do not appeal to the eye.
E.
Cartons are light.
F.
Cartons increase the risk of theft.
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