—What does PM 2.5 mean?—It"s a professional ________ indicating the condition of
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—What does PM 2.5 mean?
—It"s a professional ________ indicating the condition of air pollution.| A．term | B．item | | C．number | D．mark |
|
答案
| A |
解析
| 选A 考查名词辨析。句意：“PM 2.5是什么意思？”“它是一个表示空气污染状况的专业术语。”term“术语”，符合句意。item“项目”；number“数字”；mark“记号”。 |
举一反三
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I have learned that it"s taking ________ long time to become ________ person I want to be.| A．the; a | B．a; the | | C．the; the | D．/; a |
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(2013·山西省太原市统一检测)—David, the windows of the room are very dirty. ________ I clean them before we move in?
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