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2012化学中考最新时事热点------北京永定河因再生水获重生

作者：czhxzx  人气： 951 次  时间：2012年06月17日  星级：

【新闻背景】
2011年金秋时节，北京市“四湖一线”工程竣工开放，北京“母亲河”永定河的北京段在断流30年之后，再生水让永定河重新焕发出勃勃生机。永定河这条北京最大河流在城市化、工业化冲击下，成为北京最早遭受污染而走向水脉衰微的河流。北京内河段生态灌溉需水量1.3亿立方米，相当于北京城区每年生活用水量的十分之一以上，北京市水务部门积极开发和利用再生水，通过再生水循环利用改善河湖生态环境，修复城市水生态功能，按照城市规划将永定河流域建成绿色生态走廊。我国年废 水排放总量大约有2000亿吨，巨大的水资源再生 空间就蕴藏在巨 量的废水之中。
【新题速递】
1．2011年3月22日是第19届世界水日，宣传活动的主题是“城市用水：应对都市化挑战”。下列认识和行为中，不利于保护水资源的是（B）
A、使用 节水型器具如水龙头    B、大量使用农药、化肥，不会造成水体污染
C 、对垃圾进行分类回收处理    D、工业废水、生活污水经处理后再循环利用
2．北京市实施污水资源化与再生水开发规划，积极应对水资源紧缺和水环境恶化两大挑战，更是解决水短缺最有效、最经济的办法，再生水成为不可或缺的第二水源。则回答：
⑴水是在生活中和实验室有着十分重要的作用。请列举水在实验室中的一种用途      。
⑵永定河受到城市化、工业化冲击，北京段断流有30年之久。自然界的水常常遭到人为污染，如使用含磷洗衣粉的生活污水和农业上大量使用氮肥，会造成水中藻类大量繁殖，使水质恶化。这里的“磷”、“氮”是指（  ）
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