What day is it today? [ ]
A. It's Sunday.
B. It's Saturday.
C. It's Friday.
答案:B
施工现场出入口的沟井坎穴未设置(),可能直接危及人民群众的生命安全,值勤保安人员一旦发现,必须立即告知施工单位改正,设置覆盖物,以保障行人和车辆正常通行。
A.明显标志
B.指示灯
C.覆盖物
D.标语牌
肺阴