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【单选题】
北京市珐琅厂有限责任公司的前身是北京市珐琅厂，成立于哪一年？A.
1956年
B.
1958年
C.
1957年
D.
1960年
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皮皮学刷刷变学霸
举一反三
【简答题】阅读下面的短文，然后按照要求写一篇150词左右的英语短文。 A peacock was very unhappy with his ugly voice; and he spent most of his days complaining about it. 'It is true that you cannot sing;' said the fox, 'but look how beautif...
【单选题】—I won the high jump yesterday. —_______. [ ]
A.
It's a small thing
B.
It's all right
C.
I hope so
D.
Congratulations to you
【单选题】It's one thing to communicate with your friends on the phone, but it is quite another to _________a nice letter explainning the same ideas.
A.
convey
B.
distribute
C.
inquire
D.
compose
【单选题】蛋白质α-螺旋叙述正确的为:
A.
α-螺旋是双螺旋结构
B.
每10个氨基酸残基螺旋上升一圈，螺距为0.54mn
C.
氨基酸侧链R在螺旋内侧
D.
相邻两圈螺旋之间靠氢键维系
E.
α-螺旋是多肽链相当伸展的结构
【简答题】A．It's a new thing and people would like to try it out. B．They have less time to attend traditional classes. C．It would save a lot of money for the students. D．Televised lessons are much easier to und...
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