alarm的意义是（)。A、警告B、插入C、替换D、删除

A．Fifty underground stations were made waterproof.B．A flood wall was built.C．An alarm

A．50 underground stations were made waterproof.B．A flood wall was built.C．An alarm sys

How many countries have hunger levels under alarming？A．17.B．27.C．5.D．20.

安全色是表达（)的颜色，表示禁止、警告、指令、提示等意义。A、安全信息B、环境装饰C、危险情况

黄色与黑色间隔条纹颜色在安全中表示___。A、警告危险B、禁止越过C、注意D、不表示任何意义

在CRT／MDI面板的功能键中，用于报警显示的键是（)。A、DGNOS;B、ALARM;C、PARAM