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【題目】霧霾紀錄片《穹頂之下》引發社會熱議,據此完成下面小題。

1影響城市空氣質量的因素是

A.自然因素B.人為因素

C.自然因素為主,人為因素為輔D.人為因素為主,自然因素為輔

2下列做法中能夠改善空氣質量的是

A.日常生活中隨意焚燒垃圾B.清明祭掃時焚燒各種祭品、燃放炮竹

C.冬季燃煤取暖D.大力發展新能源汽車

【答案】

1D

2D

【解析】

1空氣污染指數反映空氣被污染的程度,指數越大,空氣污染越嚴重;森林對大氣中的灰塵有一定的吸附作用,可以通過擴大綠化面積來改善空氣質量,所以影響城市空氣質量的因素是人為因素為主,自然因素為輔;故答案選D。

2日常生活中隨意焚燒垃圾,破壞環境,不能改善空氣質量,故A錯誤;清明祭掃時焚燒各種祭品、燃放炮竹,空氣污染嚴重,不能改善空氣質量,故B錯誤;冬季燃煤取暖,空氣污染嚴重,不能改善空氣質量,故C錯誤;大力發展新能源汽車,改善環境,能改善空氣質量,故D正確;故答案選D。

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