—What does PM2.5 mean?—It's a professional indicating the condition of air pollution.A. t

发布时间：2020-08-17 09:54:18

—What does PM2.5 mean?
—It's a professional      indicating the condition of air pollution.
A. term
B. item
C. number
D. mark

网友回答

(答案→)A. term
B. item
C. number
D. mark
解析：A 考察名词辨析。句义：—PM2.5什么意思啊？—那是一个标明空气状况的专业术语。Term意为“术语”，符合题意。BCD三项与句义不符。故A正确。
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