某工程按全等节拍流水组织施工,共分4道施工工序,3个施工段,估计工期为72天,则其流水节拍应为( )。
A.6天 B.9天 C.12天 D.18天
参考答案:C
— How often do you visit your granny in the village?
— I feel ashamed. _____. [ ]
A. Very often
B. By accident
C. Just once in a while
D. All of a sudden
对比和对偶有何异同?