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【单选题】
乙型血友病缺乏的凝血因子为A.
FⅪ
B.
FⅨ
C.
FⅫ
D.
FⅧ
E.
FⅩ
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举一反三
【简答题】质胜文则野,文胜质则史。文质彬彬,然后君子。
【简答题】A．contentious B．controversial C．competitive D．competent
【简答题】A．Be competent but avoid being too outstanding. B．Be competent and get along well with his colleagues. C．Be competent and be honest and loyal to his company. D．Be competent and give his boss a good im...
【简答题】A．Be competent but avoid being too outstanding. B．Be competent and get along well with his colleagues. C．Be competent and be honest and loyal to his company. D．Be competent and give his Boss a good im...
【简答题】The hotel is an artistic building. We’ll stay in it.
【单选题】限制酶的特点不包括以下哪一项 ( )
A.
对双链和单链DNA同样切割
B.
其识别不受DNA来源的限制
C.
同一限制酶在一DNA分子上可有数个切点
D.
不同生物的DNA经相同限制酶切割后产生相同末端
E.
只识别一种核苷酸序列
【单选题】限制酶的特点不包括以下哪一项
A.
对双链和单链DNA同样切割
B.
不同的限制酶识别不同的序列,切割后可产生相同的末端
C.
同一限制酶在一DNA分子上可有数个切点
D.
不同的限制酶可切割相同的DNA序列
E.
只识别一种核苷酸序列
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