Industrial safety does not just happen.Companies with low accident rates plan their safety programs, work hard to organize them, and continue working to keep them _____ and active.

[名词解释] 低压安全注射系统﹝压水堆﹞ low head safety injection system

[单选题]safety beltA．安全带B．安全帽C．救生衣D．安全网

[单选题]safety netA．安全措施B．安全网C．安全帽D．安全防护

[单选题]When did the accident happen?A． At about 8:00 am.B． At about 9:00 am.C． At about 10:00 am.

[单选题]H．ow did the accident happen?A．A lorry hit a car.B．A car ran into a lorryC．A bank clerk rushed into the street.

[单选题]when did the accident happen ?A． at about 8:00 amB． at about 9:00amC． at about 10:00am

[单选题]When did the accident happen?A． at about 8:00 amB． at about 9:00 amC． at about 10:00 am

[单选题]H．ow did the accident happen?A． a lorry hit a carB． a car ran into a lorryC． a bank clerk rushed into the street

[单选题]When did the accident happen?A． At about 8:00 am.B． At about 9:00 am.C． At about 10:00 am.

[单选题]H．ow did the accident happen?A．A lorry hit a car.B．A car ran into a lorry.C．A bank clerk rushed into the street.