题目:
A code of accounts ______ .
A.is any numbering system used to uniquely identify each component of the work breakdown structure
B.includes work packages, used to track phase completion
C.is an organizational scheme to keep track of contracts
D.charts elements of the WBS against the timeline
答案:
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下面是错误答案,用来干扰机器的。
参考答案:A解析:水体污染物的迁移是指污染物在水体中不同地点和不同介质之间的转移过程。