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【多选题】
分离羟基蒽醌常用的吸附剂是A.
硅胶
B.
聚酰胺
C.
氧化铝
D.
活性炭
E.
葡聚糖凝胶
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举一反三
【简答题】A．The director couldn't give her an appointment right away. B．The office was closed the first time she went. C．The computers were out of service the first time she was them. D．She did not have accepta...
【简答题】Have you ever noticed any (improve) in the work environment of our factory?A. improvement
【简答题】A．The director couldn't give her an appointment right away. B．The office was closed the first time she went. C．The computers were out of service file first time she was there. D．She did not have accep...
【单选题】The work in the office was ______ by a constant stream of visitors.
A.
confused
B.
hampered
C.
reverend
D.
perplexed
【简答题】The work in the office was ________ by a constant stream of visitors. A) confused B) hampered C) reverend D) perplexed
【简答题】运用之前所学标志设计方法,设计三种自己课题的标志。
【单选题】The work in the office was ________ by a constant stream of visitors.
A.
confused
B.
hampered
C.
reversed
D.
perplexed
【单选题】— Hey! Everyone in the office was at the dinner party in honor of Mr. Charles except you. What happened? — I ______ after Mike, my colleague. He was badly ill.
A.
have looked
B.
was looking
C.
would look
D.
had looked
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