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【单选题】
物质A与B可形成低共沸混合物E，已知纯A的沸点小于纯B的沸点，若将A + B混合物在一个精馏塔中精馏，在塔顶的馏出物是A.
纯 A
B.
纯 B
C.
低共沸混合物
D.
都有可能
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【单选题】In order to get your point across in your target language, you have to learn plenty of words. How do you set about it? Dr. Paul Meara, who lectures in applied linguistics, believes there are lots of d...
A.
they are too old
B.
they lack language ability
C.
they lose their own confidence
D.
the teachers are not good enough
【简答题】如图，根据题中条件，则 （ ） 。 ， （ ） 。
【简答题】根据题意，用题中及类图中提供的术语指出图3-3所示的打电话序列图中的消息(A)～(D)。
【简答题】根据题中所述术语，指出图1-2中状态1到状态4分别是什么?
【单选题】In order to get your point across in your target language, you have to learn plenty of words. How do you set about it? Dr. Paul Meara, who lectures in applied linguistics, believes there are lots of d...
A.
they are too old
B.
they lack language ability
C.
they lose their own confidence
D.
the teachers are not good enough
【单选题】How many categories do speech acts fall into according to John Searle?
A.
Three.
B.
Four
C.
Five
D.
Six
【简答题】A．An item of clothing. B．A bottle of after-shave. C．An Olympic record. D．A pair of socks.
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