火灾危险环境分为()种区域。
A.2
B.3
C.4
D.5
参考答案:B
Give a hand if possible and these people in the flooded are as ________ our help. [ ]
A. desire
B. determine
C. decide
D. deserve
热力管道架空敷设时,管道保温层外壳距地面的净高不低于4.5m的敷设为()。
A.低支架敷设
B.中支架敷设
C.高支架敷设
D.通行地沟敷设