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【单选题】
S-R变异是属于( )。A.
毒力变异
B.
菌落变异
C.
鞭毛变异
D.
形态变异
E.
耐药性变异
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反馈参考答案：
举一反三
【单选题】—Could I use your computer, Susan? —Sorry, I’m going to _______ it now. You can use it tomorrow.
A.
work out
B.
work in
C.
work on
D.
work for
【判断题】The use of midget words and abbreviations can help to make news headlines shorter.
A.
正确
B.
错误
【简答题】—Would you mind if I use your telephone? — ________. Help yourself. A．Not at all B．Certainly C．No, I wouldn’t D．OK
【判断题】The use of midget words and abbreviations can help to make news headlines shorter.
A.
正确
B.
错误
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