这周五是班级大扫除,老师动员了全班的同学,一起来打扫教室。
周五下午,我早早的来到学校,和同学们一起大扫除。我负责扫地和换抹布水。我拿起扫把,按从里到外的顺序先把最后一排扫干净,再把倒数第二排扫干净,然后把倒数第三排扫干净,以此类推。不一会儿,我就扫完了,但我发现,我扫出来的垃圾大部分都是从同学们的桌斗里掉出来的'。我突然想到白老师说我们的桌斗就像垃圾桶,现在我也这么认为。
扫完地之后,就该换水了。这时,小水桶里的水,比墨汁还要黑,我便提着小水桶下楼换水。我上来时,看见大家都在等我换水归来。心里边暗想:下次一定要加速,不能再让大家等我一个人了。第二次,第三次,第四次……我累的气喘吁吁,再也跑不动了,于是,我们便开始了接力换水。经过我们的努力,教室已经被我们打扫的干干净净的。时间过得真快,我们也该收摊了。
这周五的大扫除,让我们班干干净净,像变了一个班似的。
今天下午,我们班得了两个第一,我很高兴!我们正在打扫卫生的时候,崔琛叽叽喳喳的说我们班得了两个第一,还说老师让下去,我心里想还没打扫完卫生,我就和伊炳坤还有徐艺航留在教室里打扫卫生。
不一会我想到一个好主意,一个人先去看情况,两个人在教室。徐艺航说:“咱们一起去。”我说:“那打扫卫生和门怎么办?” 徐艺航说:“我去。”我开门的时候她又说:“我去。”我走楼梯的时候老师来了,我又回了教室,老师喊走的时候我还在扫,徐艺航都背上书包了。老师问她说:“那么快吗?” 艺航看见也去扫,扫着扫着她扫散了,被老师说了,真好玩。
水是一切有机体的主要组成部分,全球动植物和40亿人体内含有约11200亿吨水。人类社会依赖水而生存发展。古代,人类对水取利避害,适应水而生存;近代,人类对水兴利除害,兴建工程,开发水利,控制水害;现代,随着社会和生产的发展,地球上可资利用的水日趋短缺,水体受到污染,严重影响人类生存的环境,人类逐渐认识到水是一种重要资源和环境因素,从而在更高的水平上开始对水开展了新的兴利避害活动。
世界气象组织1996年初指出:缺水是全世界城市面临的首要问题,估计到2050年,世界2/3以上的人口将生活在城市,而全球有46%的城市人口缺水,必须平衡社会经济发展和城市淡水供应管理二者之间的关系,进行水资源的储存、输送和管理的大规模工程建设。
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as we know , water is very important to man, we can’t live without water. the amount of water which is suitable to drink is less and less. but some people don’t care about it .they waste a lot of water in their daily life. even worse, they pour dirty water in to rivers. they throw rubbish into rivers , too. many rivers and lakes are seriously polluted.something must be done to stop the pollution. only in this way can we live happily. if we don’t save water, the last drop of water will be a tear-drop of us.
we know that despite the fact that seventy percent of the earth's surface is covered with water, only a little part of it is fresh water. yet the demand for fresh water in our daily life and in industry seems great. moreover, with the expansion of the population and development of industry, the amount of the fresh water needed will increase even rapidly. it is estimated that if such a trend continues, the fresh water on earth will be exhausted very soon. what is worse, more and more water resources are being polluted, making the water unfit to use.
in addition,we must warn the people of the importance of water and the danger we are facing.for example, in most asian societies where rice is the staple food, the water used after cleaning rice contains various nutrients for plant growth and is an excellent detergent to flush the toilet. furthermore, the intriguing idea of converting the inexhaustible sea water to fresh water supplies will be the ultimate solution.
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