水炮系统扑救室内火灾的灭火用水连续供给时间()
A.不宜小于1.0h
B.不应小于1.0h
C.不宜小于2.0h
D.不应小于2.0h
参考答案:B
The old man is still eager _______ work, for he can't imagine life without it. [ ]
A. at
B. for
C. on
D. of
电缆转向及分支处应设置电缆埋设标。