《环境空气质量标准》(GB3095-1996)将环境空气质量功能区分为三类。()
参考答案:对
漫画《拥塞》给我们的启示是( )
A.要重视理论对实践的指导作用
B.要积极抓住时机促成事物质变
C.要树立实践第一的观点
D.要树立全局观念,立足整体
American Indian languages, which differ widely, tended to group many units of meaning into multisyllabic words.
A.all tend
B.and tend
C.to tend
D.tending