根据现行《火灾自动报警系统设计规范》，集中报警系统宜用于（）保护对象 A.特级和一级

____people _____were killed or injured reached more than 400,000

A．The number of ,who

B．A great number of, who

C．The number of, which

D．A great number of, whom

通用可调夹具的结构主要由哪两部分组成？其特点如何？

The________junk food you eat, the________you will be.

A．fewer , healthy

B．less, healthier

C．least , most healthy

D．more , more healthily

面向战略的系统绩效管理模式

高清晰度电视便是数字电视。( )