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【单选题】
关于蛋白质分子三级结构的描述，正确的是
A.
天然蛋白质分子均有这种结构
B.
具有三级结构的多肽链都具有生物学活性
C.
三级结构的稳定性主要由肽键维系
D.
亲水基团多聚集在三级结构的内部
E.
决定其空间结构的因素是辅基
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【简答题】完形填空。 There are lots of ruies in Selina's school. She agrees with some . 1 _ them. Such as, they can't amve _ 2 _, they can't run in the hallways, and they can't eat in class. All 3 rules are okay bec...
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【单选题】Selina is a new student and you are taking him to your professor's office. When you and Selina meet your professor at his office, you should:
A.
first introduce Selina to your professor.
B.
first introduce the professor to Selina.
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be quite and let Selina introduce herself to the professor.
查看完整题目与答案
【单选题】The focus of Selina Inc., an MNC producing a range of products that can be marketed through common channels to similar customers worldwide, is marketing. Its aim is to become an insider in every count...
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查看完整题目与答案
【单选题】-------- Selina hasn’t paid for the school things , has she ? ------- _________________. Her father will pay for it .
A.
Yes , she has
B.
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Yes , she did
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查看完整题目与答案
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查看完整题目与答案