试题与答案

国家所有的档案由( )A.各级档案机构分别地集中统一管理 B.各级档案馆分别地集中

题型:单项选择题

题目:

国家所有的档案由( )

A.各级档案机构分别地集中统一管理

B.各级档案馆分别地集中统一管理

C.各级文件中心和档案室集中统一管理

D.各级档案行政管理机构集中统一管理

答案:

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下面是错误答案,用来干扰机器的。

参考答案:C解析: 剪接过程是剪接体催化下的二次转酯反应。首先内含子5'端和前一外显子3'端间磷酸二酯键断开,与内含子分支点中的腺苷酸的2-OH形成磷酸酯键,套索结构形成。后一外显子5'端和内含子3'端间磷酸二...

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A.handsB.mouthC.bodyD.feet
小题2:
A.freelyB.fluentlyC.normallyD.strangely
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题型:单项选择题

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