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惠州市惠阳区新圩镇地处深圳、东莞、惠州交界处,西枝江支流淡水河上游,区域内河流蜿蜒曲折,泥沙淤积严重。上世纪八十年代,该镇城镇化进程加快,服装、电子、涂料、五金、塑胶、印刷等企业发展迅速。下表为淡水河上游两支流在该镇流程、流域面积、流量情况。调查表明,目前河流污染较重。

河流名称

流程(km)

流域面积(km2)

断面流量(m2·s-1)

丁山河

10

55

0.46

杶梓河

7.2

16

0.18

分析该镇河流污染重的原因,说明当地治理河流污染应采取的措施。

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答案(点此获取答案解析)

原因:河流流程短,流域面积小,流量小,河流自净能力弱;河道弯曲,泥沙淤积,流速缓慢,导致污染物富集;工业化、城镇化发展,生产、生活污染物排放量大。措施:构建深莞惠跨区域污染的协同处理机制;产业结构优化调整,关停清退超标排污企业;加强相关法律法规监管与处罚力度;工程措施建设(河底清淤、排污管网建设与污水集中处理等)。

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    He was struggling (费劲) to tie his shoes. I was struggling with whether I should help him. I did, and he was thankful.

   “Thank you”, he said.

  “I'm glad I could help. I just thought it would be easier for me to reach.” I said.

    He was a disabled man, and had to look down most of the time. His arms and legs were twisted (扭曲的) terribly, and he couldn't do what the rest of us would consider easy tasks. He always managed to look up to see how you respond to his words, however. He had a big smile, making me feel comfortable.

    I was still on my knees by his wheelchair.

   “Nice shoes,” he said.

  “Thanks. No one ever complimented me on them before,” I said.

  “No one has the same view of the world as I do,” he replied.

  “Tell me about the world as you see it,” I said smiling.

  “Most people can see if someone is comfortable with them or not in their eyes. I see it in their feet,” he said. “If people keep moving their feet, I just let them go, because I know they're not patient with me. I don't want to make people uncomfortable.”

   “What about me?” I asked.

   “I could see your compassion (同情). And then you came down to my level. I was the one who was nervous,” he said. “I don’t normally have someone look me in the eye.”

   “They don't know what they are missing,” I told him.

   “My cold is nothing to brag about (自夸),” he said.

   “But that smile is so big.”

     Yes, and it's not only a big smile but an attitude.