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【判断题】
取代基共轭效应越强,单体活性越高。A.
正确
B.
错误
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反馈参考答案：
举一反三
【单选题】The bad news was that he could be a very dangerous person ______ he choose to be.
A.
should
B.
could
C.
might
D.
must
【简答题】The ____________ look on his face suggested that he must have heard some ____________ news. (surprise)
【单选题】Questions 16 and 18 are based on the news report you have just heard. 17.
A.
They feel stressed out even without any challenges in life.
B.
They feel too overwhelmed to deal with life’s problems.
C.
They are anxious to free themselves from life’s troubles.
D.
They are exhausted even without doing any heavy work.
【单选题】我国第一座电视台中央电视台的前身是（ ），于1958年5月1日开始实验播出，标志着中国电视事业的开端。
A.
天津电视台
B.
北京电视台
C.
上海电视台
D.
重庆电视台
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