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【单选题】
盐析法沉淀蛋白质的原理是( )A.
中和电荷，破坏水化膜
B.
与蛋白质结合成不溶性蛋白盐
C.
次级键断裂，蛋白质构象改变
D.
调节蛋白质溶液的等电点
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【单选题】Where do you think _____ ? [ ]
A.
he will go
B.
will he go
C.
he will go to
D.
will he go to.
【简答题】同义句转换。 1. Did you go to the cinema last night? Did you go to the _____ last night? 2. He likes seeing a film very much. He _____ seeing a film very much. 3. I would like to take a walk now. I _____ __...
【单选题】Seldom _________ to the countryside to see his parents. A) he does B) goes he C) does he go D) he does go
A.
he does
B.
goes he
C.
does he go
D.
he does go
【单选题】What will John do tomorrow?
A.
He will go picnic,
B.
He will go to school.
C.
He will go skating.
【单选题】---Your father’s never been to other countries, has he? --- ________. He plans to go abroad for a second time.
A.
No, he has
B.
Yes, he hasn’t
C.
Yes, he has
D.
No, he hasn’t
【简答题】A．He will go to instead of his wife. B．He will go to when he finishes his report. C．He will ask his boss for a leave. D．It would be better for her wife to go to.
【单选题】He said he ______ to the cinema if he ______ time.
A.
will go; will have
B.
would go; would do
C.
would go; would have
D.
would go; had
【简答题】通过对串联机组及并联机组的效率计算，对我们设计机械传动系统有何重要启示?
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