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【单选题】
维持蛋白质分子中α-螺旋和β折叠中的化学键A.
肽键
B.
离子键
C.
二硫键
D.
氢键
E.
疏水键
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【简答题】题解第5章 数理统计的基本概念.doc
【简答题】I love deejay’s creativity, and what I can do with a machine, two turntables and a mixer.
【单选题】--------Have you asked somebody to repair the machine? --------Oh, sorry, I forgot it. I _________for an engineer at once.
A.
am going to send
B.
would send
C.
have sent
D.
will send
【单选题】I developed very slowly and it took nearly two hundred years I was built as an analytical machine by Charles Babbage.
A.
before
B.
after
C.
long
D.
short
【单选题】The washing machine ___ last Wednesday works well.
A.
I bought
B.
I bought it
C.
which I buy
D.
that I bought it
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