—What does PM 2.5 mean?—It"s a professional ________ indicating the condition of

—What does PM 2.5 mean?—It"s a professional ________ indicating the condition of

题型:不详难度:来源:
—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
One reason for her ________ for city life is that she can have    easy access to places like shops and restaurants.
A.referenceB.preference
C.performanceD.consequence

题型:不详难度:| 查看答案
Because of H7N9 bird flu, all the chicken markets in Shanghai have been closed and won"t open until further ________.
A.sign B.symbol
C.contactD.notice

题型:不详难度:| 查看答案
I have learned that it"s taking ________ long time to become ________ person I want to be.
A.the; a      B.a; the
C.the; theD./; a

题型:不详难度:| 查看答案
(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?
—Of course.
A.Will B.Would
C.Shall D.Do

题型:不详难度:| 查看答案
(2013·吉林长春一模)—Please don"t tell anybody.
—I ________. I promise.
A.can"t B.don"t
C.won"t D.mustn"t

题型:不详难度:| 查看答案
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