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【单选题】
Km值的概念是A.
与酶对底物的亲和力无关
B.
是达到Vmax所必需的底物浓度
C.
同一种酶的各种同工酶的Km值相同
D.
是达到1/2Vmax的底物浓度
E.
与底物的性质无关
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举一反三
【单选题】By saying 'This is no flash in the pan'(Para.3, lines 5) ,the author means that
A.
the low inflation rate will continue.
B.
the inflation rate will rise again.
C.
inflation will disappear entirely.
D.
there is no inflation at present.
【单选题】They _____ several extra bus lines during the rush hours .
A.
get
B.
have
C.
run
D.
take
【单选题】On-Time Buses on the Rise March 10 - The Jackson Citys bus lines earned their highest on-time records in June, according to a report released by the Department of City Transportation. The departments ...
A.
A revised policy
B.
A new bus station
C.
A bus line study
D.
A travel plan
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