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【題目】城市通風走廊是指在城市規劃、建設過程中留出一定空間的走廊,以保持或引導自然氣流貫穿高樓大廈密集的城市,起到改善環境的作用(如圖甲).北京將建設5條寬度500米以上的一級通風走廊,多條80米以上的二級通風走廊(如圖乙).有關這種做法的影響,下列說法正確的是(  )

①通風廊道走向,基本和北京市冬、夏季風風向一致

②城市通風走廊能增加空氣流動性,減輕污染

③通風走廊能從根本上杜絕霧霾

④通風走廊應當以綠地為主.

A. ①②③ B. ①③④ C. ②③④ D. ①②④

【答案】D

【解析】讀圖可知, ①通風廊道走向,基本和北京市冬、夏季風風向一致; ②城市通風走廊能增加空氣流動性,減輕污染; ③通風走廊能起到改善環境的作用,但不能從根本上杜絕霧霾; ④通風走廊應當以綠地為主.故答案選D.

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