A.0 B.1 C.2 D.3
A.5 B.10 C.14 D.16
A.5 B.7 C.9 D.11
A.工期为18天 B.各施工过程流水节拍相等 C.各施工过程流水节拍不相等 D.各施工过程之问流水步距不相等