题目内容

下面关于酶的叙述正确的是()。

A. 酶是由活细胞产生的
B. 酶只能催化特异的底物
C. 酶具有高效催化作用
D. 酶的化学本质是蛋白质
E. 一切能够使蛋白质变性失活的因素都可以使酶变性失活

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Over the next two decades ________ wrote a succession of widely acclaimed plays which may be categorized roughly into three groups: histories, comedies, and tragedies or tragicomedies.

A. his
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A. That
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A. little
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A. converation
B. convention
C. conventions
D. convenience

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