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【单选题】
None of the staff had any ______ her.A.
interaction with
B.
communication to
C.
interact with
D.
communicate with
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举一反三
【单选题】The number 2548 is read as________________.
A.
two thousands and five hundreds and forty and eight.
B.
Two thousand, five hundred and forty-eight
C.
Two thousand, five hundreds, forty eight
D.
Five hundred and five hundred and forty-eight
【简答题】什么是解链温度?影响DNA Tm值大小的因素有哪些?为什么?
【单选题】The number 2548 is read as ______________.
A.
two thousands and five hundreds and forty and eight
B.
two thousand, five hundred and forty-eight
C.
two thousand, five hundreds, forty-eight
D.
five hundred and five hundred and forty-eight
【单选题】下列所述哪个是DNA分子的一级结构
A.
脱氧核糖核苷酸残基的排列顺序
B.
各种单核苷酸的连接方式
C.
双螺旋结构
D.
连接单核苷酸间的磷酸二酯键
E.
以上都不是
【简答题】根据49×52=2548填空． ______×______=2.548； ______×______=2.548； ______×______=2.548； ______×______=2.548．
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