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

①通風(fēng)廊道走向，基本和北京市冬、夏季風(fēng)風(fēng)向一致

②城市通風(fēng)走廊能增加空氣流動性，減輕污染

③通風(fēng)走廊能從根本上杜絕霧霾

④通風(fēng)走廊應(yīng)當(dāng)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(fēng)廊道走向，基本和北京市冬、夏季風(fēng)風(fēng)向一致; ②城市通風(fēng)走廊能增加空氣流動性，減輕污染; ③通風(fēng)走廊能起到改善環(huán)境的作用,但不能從根本上杜絕霧霾; ④通風(fēng)走廊應(yīng)當(dāng)以綠地為主.故答案選D.

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