图是 “我国某年份酸雨分布图”， 读图回答下列各题。
小题1:有关酸雨的叙述正确的是（ ）
A．图中雨水pH值大于5.6的地区为酸雨区
B．我国的酸雨主要是碳酸型酸雨
C．酸雨会使水、土壤酸化，危害生物，腐蚀建筑物，并危害人体健康
D．防治酸雨的根本途径是减少氟立昂和氧化氮的排放小题2:我国西南地区出现重酸雨区的原因主要有（ ）
①有色金属冶炼工业发达 ②地形闭塞，不利于酸性气体的扩散
③多云雾，易形成酸雨 ④气温高，不利于空气对流
A．①②③
B．①②④
C．②③④
D．①③④
小题1:C
小题1:A
本题考查我国的环境问题。
小题1:PH值<5.6的雨水为酸雨；我国以煤炭为主要能源，故我国的酸雨主要是硫酸型酸雨；防治酸雨的根本措施主要从减少人为硫氧化合物和氮氧化合物的排放分析，而与氟立昂关系不大。故选C项。
小题2:我国西南地区的重酸雨区主要与当地工业排放大量酸性气体、丰富的降水和盆地地形不利于扩散等方面分析。
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| Some time ago, my wife and I traveled to Sydney to visit my sister. We had taken more clothes than we needed and struggled onto the train. In front of us, in a face-to-face seat, 1 six young men in their early 20s. They were strong and 2 , and I disliked them immediately. They were laughing loudly, obviously 3 themselves and they 4 a foreign language. As we went quickly 5 the countryside, I kept an eye on them as they joked around. Sometimes they took a look in our direction.When two of them got 6 . I relaxed a little. The rest of them 7 to laugh and joke in their own language. When we finally arrived at our 8 only one of them was left on the train.He was obviously 9 too and as I struggled towards him with my heavy luggage (行李) , he reached out and asked in English: "Want a hand with that, mate?" He 10 the heavier bag up the station steps for us. We were pleasantly surprised and very grateful. | ||||
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