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电喷雾电离源可用于分析离子型化合物、极性化合物、难挥发或热敏感化合物,也可用于分析高分子量化合物。A.
正确
B.
错误
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举一反三
【单选题】. —Ken, , but your TV is going too loud. —Oh, I ’m sorry. I’ll turn it down right now.
A.
I’d like to talk with you
B.
I’m really tired of this
C.
I hate to say this D I need your help.
【简答题】Behave yourself. ____that?
【简答题】You should behave yourself. Paul asks you to behave yourself.
【单选题】It is too hot ________ today, so I’d like to stay home watching TV.
A.
working out
B.
to work out
C.
to working out
D.
worked out
【简答题】You promise to behave yourself. You shall not go to the party this afternoon.
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