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【单选题】
对于放大电路，而闭环是指______。A.
考虑信号源内阻
B.
存在反馈通路
C.
接入电源
D.
接入负载
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举一反三
【单选题】What does the woman suggest that the man do?
A.
Bring the old computer to the store
B.
Sell the old computer to the store
C.
Stop driving the old car
D.
Copy the contents of the old computer
【单选题】Life in the Year 2040 Do you forget to turn off the lights and heaters when you go out, of a room? In 2040 it will not matter.They will turn themselves off—and on again when you turn. You will choose ...
A.
in 2040 we will live without the lights and heaters
B.
in 2040 we will use much more lights and heaters
C.
in 2040 there will be no switches of lights and heaters
D.
in 2040 lights and heaters will be on and off automatically
【单选题】Looking to the Future—2040 Do you forget to turn off the lights and heaters when you go out of a room? In 2040 it will not matter. They will turn themselves off—and on again when you return. You will ...
A.
in 2040 we will live without the lights and heaters
B.
In 2040 we will use much more lights and heaters
C.
In 2040 there will be no switches of lights and heaters
D.
In 2040 lights and heaters will he on and off automatically
【简答题】The Mayor paid a (person) ______ visit to the old man who was celebrating his 100th birthday.
【简答题】Do you remember who gets angry because you forget to tidy up your room before going out? Do you remember who feels with your dress from head to feet? This person is your boss nor your friend. It’s fun...
【单选题】听力原文：M: Susan isn't here yet. Did you forget to invite her? W: She was ready to come, but then changed her mind. Q: Why isn't Susan present? (14)
A.
She wasn't invited.
B.
She wasn't ready to come.
C.
She altered her decision.
D.
She forgot the invitation.
【简答题】A young man and an old man were waiting for a bus at a station. They sat _1_ _ each other. “What’s that in your bag?” asked the young man, pointing to a big bag beside the ___ 2_ _. “Money, nothing bu...
【单选题】听力原文：M: Helen isn't here yet. Did you forget to invite her? W: She was going to come, but then she changed her mind. Why isn't Helen present?
A.
She decided not to come.
B.
She forgot to come.
C.
She wasn't invited.
D.
She altered her decision.
【单选题】Do you forget to turn off the lights and heaters when you go out of a room? In 2040 it will not 【B1】. They will turn themselves off—and on again when you return. A sensor will 【B2】 the presence of a h...
A.
matter
B.
function
C.
work
D.
mind
【简答题】Do you forget to turn off the lights and heaters when you go out of a room? In 2040 it will not matter. They will turn themselves off—and on again when you return. You will choose the temperature for ...
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