— _____ colour is it?
— It's white. [ ]
A. Which
B. What
C. Who
答案:B
当()<1时,表示进度延误,即实际进度比计划进度拖后。
A.CV
B.SV
C.CPI
D.SPI
-3,10,7,17,(),41。
A.18
B.21
C.24
D.31