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Usually a meteorological observatory (?????) _____ air quality in urban areas from one to five: excellent, fairly good, slightly polluted, poor, and dangerous.

A. identifies       B. purifies       C. classifies       D. clarifies

 

【答案】

C

【解析】

试题分析:A辨别,识别;B净化;C分类,归类;D澄清,使…清楚;句义:通常气象台把城市空气质量从一到五分为五类:非常好,很好,轻微污染,严重污染,重度污染。根据句义说明C正确。

考点:考察动词词义辨析

 

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