强制性产品认证收费由（）统一收取。 ["强制性产品检测机构","CCC代理申办机构","认证咨询机构","强制性产品认证机构"]
由于1301灭火剂毒性较1211和2402大，所以灭火系统的布置有三种形式。
The Safety Radio Certificate for the cargo Ship is issued（）. ["by the Radiotelegraphy Authority of a country","in accordance with the Government Regulations","by Complying with the Provisions of the international Conventions","under the Provisions of the SOLAS Conventio"]
制定人力计划的第一步是（）。 ["说明企业人力资源管理的政策","拟订当年人力计划","确定企业发展方向和经营方针","对内外部人力市场进行分析"]
二氧化碳因它不燃烧、不助燃、比重比空气重，可覆盖在固体燃烧物表面使火熄灭不易复燃。
偏振镜的使用方法？
