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【单选题】
涉及色谱过程热力学和动力学两方面因素的是A.
保留值
B.
分离度
C.
相对保留值
D.
峰面积
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举一反三
【单选题】—Does your sister often talk to your parents? —Yes, . [ ]
A.
she does
B.
she don't do
C.
she isn't do
【单选题】—Can I have ________ apple? —Oh, your sister has just had it.
A.
another
B.
other
C.
one more
D.
the other
【单选题】My sister Sue ____________ a new coat, but I ____________. [ ]
A.
have, doesn't
B.
had, didn't
C.
didn't have, has
【单选题】-- Your father was angry ______ your sister just now, wasn't he?-- Yes, because he was not pleased ______ her homework.
A.
with with
B.
for to
C.
about for
【简答题】—________is your sister? —Sorry，l don-t know．
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