火灾报警控制器按其用途不同可分为（）火灾报警控制器几种基本类型。
A.主动型
B.区域型
C.集中型
D.被动性
E.通用型
参考答案：B, C, E
China's first compulsory safety regulation on primary buses, which requires every seat to have a seat belt,
will ____ on July 1. [ ]
A. have an effect
B. take effect
C. bring into effect
D. come to effect
控制人口数量，提高人口质量和全民健康水平，迫切需要什么来提供强有力支撑？
