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—What does PM2.5 mean?

—It's a professional ________ indicating the condition of air pollution.

Aterm Bitem

Cnumber Dmark

 

A

【解析】A 考察名詞辨析。句義:—PM2.5什么意思啊?—那是一個(gè)標(biāo)明空氣狀況的專(zhuān)業(yè)術(shù)語(yǔ)。Term意為“術(shù)語(yǔ)”,符合題意。BCD三項(xiàng)與句義不符。故A正確。

 

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