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【单选题】
某二元混合物,若液相组成xA为0.45时相应的泡点温度为t1,若气相组成yA为0.45时相应的露点温度为t2,则()A.
t1 < t2
B.
t1 =t2
C.
t1 > t2
D.
无法判断
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举一反三
【单选题】We'll do what we can _____ you with your English study. [ ]
A.
to help
B.
help
C.
helped
D.
be helping
【单选题】What does the author think of the study of English?
A.
The study of English is excellent preparation for professional life
B.
The study of English should be business-oriented.
C.
The study of English is restricting or impractical
D.
The study of English is highly rewarding and demanding.
【多选题】According to the second English study, what kind of topics could account for the difference of men and women's gossip time?
A.
entertainment
B.
politics
C.
sport
D.
culture
E.
economics
F.
leisure
【单选题】It is because English is very useful ______.
A.
that we study it hard
B.
what we study hard
C.
why we study it hard
D.
which we study hard
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