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【单选题】
根据底物浓度一定时酶活性与酶量成正比，当底物浓度范围设计在10～20Km时，底物消耗率为1%～5%时，其初速度可达最大速度的A.
90%～95%
B.
85%～90%
C.
80%～85%
D.
75%～80%
E.
70%～75%
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【单选题】The reason why the mice in Ader' s experiment avoided saccharin was that ______ .
A.
they disliked its taste
B.
it affected their immune systems
C.
it led to stomach pains
D.
they associated it with stomach
【单选题】The reason why George is looking for another job is that he’s _____ his manager’s complaints.
A.
put up with
B.
come up with
C.
kept up with
D.
fed up with
【简答题】单位时间内流经管道任一截面上的体积量,称为 。
【简答题】单位时间内流经管道任一截面的流体量称为 ,其表示方法有 和 两种。
【单选题】As for Latin America generally, there’s no reason why, ______resources available, it can’t become a highly industrialized area.
A.
in terms of
B.
in favor of
C.
in honor of
D.
in charge of
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