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【单选题】
有机磷农药对酶的抑制作用可用哪种方法解除?A.
用透析的方法解除
B.
用超滤的方法解除
C.
提高底物浓度
D.
用定
E.
用二巯基丙醇
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反馈参考答案：
举一反三
【单选题】. Jane has been working for three months without going on holiday . . She should have taken a vacation ,but she couldn’t ____the time.
A.
afford
B.
spend
C.
take
D.
waste
【单选题】Why will Nell come late to the seminar?
A.
She will be in a meeting.
B.
She will be on vacation.
C.
She will have to finish the report.
D.
She will be out of the office.
【单选题】Juliet is not at work. She is taking a______until the end of this week.
A.
vocation
B.
vacation
C.
vacancy
D.
volume
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