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
A stranger ___ his room without his permission.
A.broke up
B.broke out
C.broke into
D.broke down
美利坚合众国的“开国元勋”——__________________