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【判断题】
多级错流萃取中,当各级溶剂用量相等时,达到一定的分离程度所需的总溶剂用量最少。 ( )A.
正确
B.
错误
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皮皮学刷刷变学霸
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【单选题】He asked, "Where are you to get off, John?" He asked John where _____________ get off.
A.
was he to
B.
he was to
C.
does he to
D.
would he to
【简答题】Traffic TV Avoid the jams — see where tailbacks are before you set off and while on the move. Traffic TV is free to use on your personal computer and only £4 per month (se e below for other network ch...
【单选题】听力原文：W: Where do you want me to drop you off? M: Right here is fine. Q: What will the man probably do? (15)
A.
Get out of the car.
B.
Pay the parking fine.
C.
Take his coat off.
D.
Make a right turn.
【单选题】听力原文：W: Do you have an address where I can write to you? M: No, I'll be off camping in the mountains most of the time. But if you write to me at my uncle's house, he'll hold my mail until I get there....
A.
At the post office.
B.
At his home address.
C.
At his mountain cabin.
D.
At his uncle's address.
【单选题】一Do you know where Liberty Street is? 一 It's off Oak Street, near the park. —____. 一 I don't know exactly. Perhaps every five minutes or so.
A.
The park? Which one do you mean?
B.
Do you have any idea where Pine Street is?
C.
By the way, do you know how often the Number 5 bus runs normally?
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