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【单选题】
下列关于DNA连接酶催化反应的说法中，正确的是 [ ]A.
DNA复制时与子链之间形成氢键
B.
黏性末端碱基之间形成氢键
C.
两个DNA片段黏性末端之间的缝隙的连接
D.
A、B、C都不正确
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反馈参考答案：
举一反三
【简答题】网络协议采用层次结构模型有什么好处?
【简答题】网络协议采用层次结构模型有什么好处?
【简答题】She bumped into her boyfriend in town this morning.
【单选题】Getting bumped from a donkey is _________ getting bumped from a flight.
A.
the same as
B.
different from
C.
more painful than
D.
less painful than
【单选题】Victorial bumped into his brother quite by chance in the supermarket. The underlined part means __________.
A.
risk
B.
opportunity
C.
possibility
D.
luck
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