在同一种属中,催化活性相同而酶蛋白的分子结构、理化性质及免疫学性质不同的一组酶称为同工酶。同工酶在体内的生理意义主要在于适应不同组织或不同细胞器在代谢上的不同需要。因此,同工酶在体内的生理功能是不同的。 ()
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Jo was the best student in class.
A. Right.
B. Wrong.
C. Doesn't say.
第二节 对话应答
在本节中,你将听到10个简短话语,请从[A]、[B]、[C]三个选项中选出一个最佳应答,并标在试卷的相应位置。每个话语后有20秒钟的停顿,以便选择答案和阅读下一个问题。每个话语读两遍。
听力原文:Sorry, I lost your book.
(6)
A. Thank you for telling me.
B. Why not?
C. Never mind.
听力原文:Excuse me. How can I get to the railway station?
(15)
A. I'm sorry. I don't know.
B. I'm still thinking about it.
C. I'm glad about it.
A bundle of sticks was harder to break than a single one.
A. 真
B. False