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【多选题】
蛋白质变性作用的实质是A.
蛋白质空间结构破坏
B.
肽键断裂
C.
发生了沉淀
D.
丧失生物学功能
E.
次级键断裂
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反馈参考答案：
举一反三
【单选题】听力原文：M: Excuse me. Have you been waiting long? W: About ten minutes. M: Did you notice whether the number seven bus has gone by? W: Not while I've been standing here. I'm waiting for the number seven ...
A.
Rainy and cool.
B.
Windy.
C.
Hot and dry.
D.
Cold and dry.
【单选题】听力原文：M: Excuse me. Have you been waiting long? W: About ten minutes. M: Did you notice whether the number seven bus has gone by? W: Not while I've been standing here. I'm waiting for the number seven ...
A.
She is waiting for the man.
B.
She is waiting for her mother
C.
She is waiting for a bus.
D.
She is waiting for it to stop mining.
【单选题】听力原文：M: Excuse me. Have you been waiting long? W: About ten minutes. M: Did you notice whether the number seven bus has gone by? W: Not while I've been standing here. I'm waiting for the number seven ...
A.
Cold.
B.
Very hot.
C.
Cooler.
D.
Drier.
【单选题】听力原文：M: Excuse me. Have you been waiting long? W: About ten minutes. M: Did you notice whether the number seven bus has gone by? W: Not while I've been standing here. I'm waiting for the number seven ...
A.
She is waiting for the man.
B.
She is waiting for a bus.
C.
She is waiting for her mother.
D.
She is waiting for it to stop raining.
【单选题】听力原文：M: Excuse me. Have you been waiting long? W: About ten minutes. M: Did you notice Whether the number seven bus has gone by? W: Yes, it is. I wish that it would rain and cool off. M: Me too. This ...
A.
She is waiting for the man.
B.
She is waiting for her mother.
C.
She is waiting for a bus.
D.
She is waiting for it to stop raining.
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