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【单选题】
下列关于酶促化学修饰调节特点的叙述，不正确的是A.
调节过程一般不消耗能量
B.
催化效率比变构调节效率高
C.
磷酸化和脱磷酸化是最常见的酶促化学修饰
D.
一般属此类调节方式的酶具有(高)活性和无(低)活性形式
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【单选题】Over the years critical reviews of Bergman's work have______.
A.
without exception been positive
B.
deplored his seriousness
C.
often been antithetical
D.
usually focused on his personality
【简答题】设(A,+,·)是有两个二元运算的代数系统,若(A,+)是阿贝尔群,(A,·)是(),且运算·对运算+是可()的,则称(A,+,·)为环。
【单选题】The conference has been held to discuss the __________ of global warming on people's lives all over the world. [ ]
A.
importance
B.
effects
C.
protection
D.
attitudes
【简答题】This company's share price has been extremely volatile over the last twelve months.
【单选题】The conference has been held to discuss the ________of global warming on people’s lives all over the world.
A.
importance
B.
effects
C.
protection
D.
impression
【单选题】Shakespeare’s play Hamlet ______ into at least ten different films over the past years.
A.
had been made
B.
has been made
C.
was made
D.
would be made
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