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【单选题】
已知点A(2,1),B(5,-1),则 =(     )
A.
3
B.
C.
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A.
组蛋白
B.
核心颗粒
C.
α-螺旋
D.
螺线管
E.
核小体
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A.
超螺旋
B.
核心颗粒
C.
α-螺旋
D.
组蛋白
E.
核小体
【单选题】According to the article, one reason for the discovery of new diseases is ____.
A.
According to the article, one reason for the discovery of new diseases is ____.
B.
According to the article, one reason for the discovery of new diseases is ____.
C.
changes to animal habitats bring humans and animals into contact
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【单选题】真核细胞染色质的基本结构单位是
A.
组蛋白
B.
核心颗粒
C.
核小体
D.
双螺旋
E.
α - 螺旋
【判断题】The reason why one learns assembly language is that one learns about the computers' architecture and operating system.
A.
正确
B.
错误
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【单选题】At the same time there ______ the pressure on staff and this is perhaps one reason for the growth of white collar work unions in the banks.
A.
have increased
B.
are increasing
C.
was increased
D.
has been increased
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