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【多选题】
有关b变构酶的叙述正确的是A.
大多数变构酶是多聚复合物
B.
是体内快速调节酶含量的重要方式
C.
可有调节亚基和催化亚基
D.
酶从一种向另一种转变时、酶的活性发生改变
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【单选题】Most students think they should have _______ at school if there were no examinations.
A.
the happiest time
B.
a more happier time
C.
much happiest time
D.
a much happier time
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