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【单选题】
对酶活性中心的叙述错误的是A.
结合基团在活性中心内
B.
催化基团属于必需基团
C.
具有特定的空间构象
D.
空间结构与酶催化活性无关
E.
底物在此被转变为产物
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举一反三
【单选题】A: Hello. Could I speak to Linda B: Speaking. A: ______
A.
How do you do
B.
Glad to hear your voice.
C.
Fine, that"s good.
D.
Hi, Linda. This is Burt.
【单选题】— Hello. Could I speak to Tina? — Speaking. — .
A.
How do you do?
B.
Glad to hear your voice.
C.
Fine, that’s good.
D.
Hi, Tina. This is Burt.
【简答题】听力原文：A: Hello. B: Hello. Could I speak to Cathy Schaefer, please? A: Speaking. B: Oh, hi, Cathy. This is Dick Carpenter. Do you re member—from Bill Stevenson's party? A: Oh, of course, Dick. How are y...
【简答题】Conversation 2 A: Good morning, Boston Motors. How can I help you? B: Hi, could I speak to Marty Bickman, please? A: Sure, one _________ please. Oh, I ’ m sorry but Mr Bickman isn ’ t in his office at...
【单选题】听力原文：[Student] Hello. Could I speak to the Dean of Admissions? I have an appointment with her at 12:00a.m.. [Dean] Hi. My name is David Blade and I am the Dean of Admissions. You must be Judy Smith. I...
A.
Applying to the university.
B.
The competitiveness of the university.
C.
Procedure of attending the university.
D.
Preparing to enter the university.
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