有条件时,室外消防给水管道的直径应不小于DN()。
A.65
B.80
C.100
D.150
参考答案:D
解析:室外消防给水管道的直径不应小于DN100,有条件的应不小于DN150。
---What do you think of the film Avatar?
-----I think it’s ______ , but someone thinks it’s much too ______.
A.wonderful enough ;bored
B.enough wonderful ;boring
C.wonderful enough ;boring
D.enough wonderful ;bored
因式分解:4ax2-a=