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【判断题】
邻硝基苯酚和对硝基苯酚可用水蒸汽蒸馏法分离,是因为邻硝基苯酚形成分子内氢键,而对硝基苯酚形成分子间氢键A.
正确
B.
错误
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举一反三
【简答题】A．Mr. Smith. B．Mr. Johnson. C．The woman. D．Mr. Black.
【简答题】The harassing budget problems of the past few months have on her health and there are shadows beneath her eyes.
【简答题】The harassing budget problems of the past few months on her health and there are shadows beneath her eyes.
【单选题】The harassing budget problems of the past few months————-on her health and there are shadows beneath her eyes.
A.
have engaged
B.
have taken a gamble
C.
have taken their toll
D.
turned the tide
【多选题】Listen to a dialogue and fill in the blanks with the information you get. U1-P2-2 Li Qing: Hello, ? Mr. Black: Oh, yes. Simon Black. Li Qing: , Mr. Black? Mr. Black: How do you do? ? Li Qing:...
A.
Are you Mr. Black
B.
How do you do
C.
Are you a new student
D.
I'm so glad to meet you
【简答题】根据定积分的几何意义，计算
【单选题】What does the man mean?
A.
Mr. Black isn't in the office.
B.
Mr. Black is busy in the office.
C.
Mr. Black is asking the way.
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