题目内容
（请给出正确答案）
[主观题]
Is the sum of all budgets established for the work to be performed（).A.CPIB.BACC.SPID.EAC
Is the sum of all budgets established for the work to be performed().
A.CPI
B.BAC
C.SPI
D.EAC
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A.信源
B.信道
C.信宿
D.编解码
