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【单选题】
下列关于需求变更影响分析的做法中，（）是错误的
A.
需求主管人员把需求变更的优先级分为5级
B.
建立一个需求决策数据库，根据数据库内容知道变更决策
C.
没有代价或不影响进度的变更可以直接实施
D.
变更分析流程需考虑：涉及问题核对，影响软件元素核对，评估变更工时、评估工作值总和、任务顺序、变更对路径的影响，对进度成本的影响、优先级等
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A.
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B.
Koreans are selling VCRs in the United States above their production cost
C.
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