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【单选题】
在形成酶－底物复合物时（）A.
酶和底物均发生变化
B.
主要是底物的发生变化
C.
主要是酶的发生变化
D.
酶和底物的都不发生变化
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】课文中表示“把某事当回事”的词组是?
A.
take sth an issue
B.
get sth an issue
C.
make sth an issue
D.
let sth an issue
【单选题】He is a very_____ student. He studies very ______. [ ]
A.
well, good
B.
good, well
C.
good, good
D.
well, well
【单选题】---John has got a very good job in the government . ---_______ he looks so happy.
A.
No, doubt
B.
No wonder
C.
That’s because
D.
It’s natural
【单选题】—Mr. Smith has got a very good job in the famous company. —_____ he looks so happy. [ ]
A.
It's certain
B.
That's because
C.
No doubt
D.
No wonder
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