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【单选题】
平常测定酶活性的反应体系中,哪项叙述是不适当的A.
作用物的浓度愈高愈好
B.
应选择该酶的最适PH
C.
反应温度应接近最适温度
D.
合适的时间
E.
有的酶需要加入激活剂
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反馈参考答案：
举一反三
【单选题】听力原文：W: Welcome to Jingli Hotel. How may I help you? M: I'd like a room please. W: Would you like a single or a double? M: I'd like a double, please. W: May I have your name, please? M: Yes. It is Spa...
A.
Teacher and student.
B.
Manager and guest.
C.
Receptionist and guest.
D.
Friends.
【单选题】听力原文：W: Now, would you please fill out these customs forms for each package? Please state clearly the contents and value of each, and the name and address of the returnee. Better in block letters. M: ...
A.
A doctor.
B.
A clerk.
C.
a professor.
D.
A waitress.
【简答题】书法的基本要求是什么?
【简答题】读书指导法的基本要求是什么?
【单选题】听力原文：M: Doctor! Doctor! Help me, please! W: Take it easy, please, Sit here, now, what' s the matter with you? And can I help you? M:I feel sick. I have a bad stomache-ache, and my head troubles me a l...
A.
Yes, he did.
B.
No, he didn't.
C.
We are not sure
【单选题】听力原文：M: Doctor! Doctor! Help me, please! W: Take it easy, please! Sit here, now, what's the matter with you? And can I help you? M: I feel sick. I have a bad stomach-ache, and my head troubles me a lo...
A.
Yes, he did.
B.
No, he didn't.
C.
We are not sure.
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