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搜题
【单选题】
When the government authority at the end of the tax year sends thousands of notifications to people with an estimate of the tax they need to pay, these letters are likely to be produced by a:A.
Decision support system
B.
Executive information system
C.
Expert system
D.
Management information system
拍照语音搜题，微信中搜索"皮皮学"使用
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知识点：
皮皮学刷刷变学霸
举一反三
【简答题】核糖体成熟的大小亚基常游离于细胞质中，当大亚基与mRNA结合后，小亚基才结合形成成熟的核糖体。
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