题目内容
5．PM 2.5is a professional ______ indicating the condition of air pollution，which is becoming more and more familiar to the common Chinese．（ ）| A． | term | B． | item | C． | poison | D． | case |
分析 PM 2.5是一个表明空气污染状况的专业术语，这个词对于普通中国人变得越来越熟悉了．
解答 答案：A．根据PM 2.5is a professional （专业的）可以知道PM 2.5是一个专业术语，所以选择A term译为"术语"．其他选项与句义不符，B项译为"项目"；C项译为"毒药"；D项译为"实例"．
点评 考查名词辨析．高考英语词汇辨析一般在于同义词、近义词的词义和用法辨析、反义词之间的意义差别、词组（短语）的用法异同点以及一些习惯用法和固定搭配等．
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