消火栓沿道路设置,靠近路口。当路宽大于等于60m时,宜双侧设置消火栓,消火栓距建筑墙体应大于( )。
A.30m
B.40m
C.50m
D.55m
参考答案:C
七圣散1功效与作用
This new method not only saves time but also saves energy()operating on two batteries instead of four.
A.in
B.by
C.on
D.for