When loading or discharging dry mud or cement, crew members should use goggles and______.(1.0)
A.facial respirator mask B.ear plugs C.rubberized boot D.fireman's outfit正确答案A
When loading or discharging dry mud or cement, crew members should use goggles and______.(1.0)
A.facial respirator mask B.ear plugs C.rubberized boot D.fireman's outfit正确答案A
