架设单体液压支柱时，支柱的初撑力，柱径为80mm的不小于（）KN。
A.50
B.60
C.80
D.90
参考答案：B
5个18的和除以9，列式为______，结果是______．
–I think the teacher should give Ted one more chance.
--Yes, it’s not his fault to miss the bus.
A．another
B．another one
C．once
D．one another
