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【多选题】
按分离机制不同色谱法可分为A.
吸附色谱法
B.
分配色谱法
C.
离子交换色谱法
D.
空间排阻色谱法
E.
亲合色谱法
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反馈参考答案：
举一反三
【单选题】听力原文：M: Look, Lynn, I think I have to make our meeting on 18th of October to another day. You see, I have to go out to our branch office in Los Angles to attend the opening ceremony. W: Em, yes, let m...
A.
B.
【单选题】—Hi, Susan, you look tired. —I ______ for months for the coming celebration for the school’s 60th anniversary.
A.
was preparing
B.
have been preparing
C.
had prepared
D.
prepare
【单选题】—Hi, Susan, you look tired. —I for months for the coming celebration of our school’s 90th anniversary.
A.
was preparing
B.
have been preparing
C.
had prepared
D.
prepare
【单选题】---Mr. Wu, can I have a look at the scores? ---Well, you are a senior, so I_____ hardly remind you that the scores are not open to students.
A.
can
B.
need
C.
will
D.
shall
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