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【判断题】
系统的特点是隧道通风系统。无屏蔽门车站多采用此种系统,应用较广。A.
正确
B.
错误
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【简答题】信号是信息的载体,在电路中所用的电信号划分为 __________________ 和模拟信号。
【单选题】A: _________ do you exercise? B: I exercise every day!
A.
How
B.
What
C.
How often
D.
How much
【单选题】听力原文：W: How's your morning exercise coming along? M: Perfect. I do morning exercise every day now except when it rains. How're things with you? W: Very well. Can you see I've lost several pounds? What...
A.
Both the man and woman like sports.
B.
The woman does morning exercise every day except when it rains.
C.
The man wants to lose weight.
D.
Both the man and the woman want to keep fit.
【简答题】抽水蓄能水电站运行有何特点及作用？
【单选题】—__________ do you exercise? —I exercise three times a week. [ ]
A.
How often
B.
How many days
C.
How usually
D.
How much
【单选题】---________do you exercise? -I exercise once a day. [ ]
A.
How often
B.
How long
C.
How old
D.
How much
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