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水力发电论文1500字体要求

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zlccy

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Cherish the water Good afternoon!my dear ladies and gentalman!today,I am glad to stand here to give you a speech and thank you giving me such a chance,I will not disappoint we all know that we can not live without water,although there is much water on the earth, but the water which we can drink ,it is very litte It just occunt for thirty percent ,the other seventy percent is and the seventeen percent of the thirty percent is on the north pole and south pole's so we can't drink it maybe someone will ask me why we don't drink the seawater ? there is much seawater on the earth ,isn't there?Yes,I have to admit that is truth,but do you know why we can't drink the seawater? Because the seawater include much poisonous thing and saltcontant it's bad for our Now, because humankind built a lot of fictory on the earth, it made the water became yellow from green and the sky became grey from blue, the north pole and south pole's glancier has began to thaw,and the sealelvel and temperature has razen when I was a child , there is a river in my hometown, at that time ,there are many frogs and fishs in the river ,when spring come ,many frogs sang songs onthe bank ,many children swam in the river, it made the river full of vim but now it has chenged , it became dirty and smelly,fishs and frogs disappear from this river ,it just leave much rabbish and weast-products in the accroding to this rivers experence ,I think if we don't control it we will distroy maybe someone will laugh at me and think I say frighting thing just to cause alarm,but we all know that the weather is more and more hot and arid,many river has began to dried-up, and many place became so, ladies and gentalman, we must cherish the waterand protect our environment or it will do harm to thanks for listening !

水力发电论文1500字体要求

209 评论(10)

跳高长江

保护水资源从我做起人们常说“水是生命之源,生存之本。”是呀,人可以几天不进食,但不可以几天不喝水。但是,你知道吗?现在,全球有20亿人口正处于严重缺水状况!全世界每年因喝了不干净的水而死亡的儿童就有5000万人!这数字是多么令人怵目惊心!水的危机,已经向人类敲响了警钟! 水很重要,水也很普通。你看,波澜壮阔的大海,碧波荡漾的湖水,潺潺流淌的溪水;一阵绵绵细雨,一场倾盆大雨。遍眼之处都是水,多得让人感到似乎取之不尽,用之不竭,水多得让人可以随时忘记,随时丢弃,不存一丝怜惜。你听,“丁冬,丁冬……”那是什么声音?哦,是水龙头在抽泣,谁粗心的没把水龙头拧紧就自个儿乐去了。“哗哗哗……哗哗哗……”这是什么声音?哦,原来是爸爸在刷牙,他刷完一口牙,自来水积满了一脸盆,然后随手把滑塞一按,咕咚咕咚全冲到下水道去了。爸爸呀,你怎么不先给水龙头关一下,这么多水白白流走了,难道你一点儿也不心疼?生活中像我爸爸这样浪费水的现象比比皆是。如洗澡涂肥皂时不关水龙头;自来水管发生漏水或爆管未得到及时修理;用过量水洗车,洗车水未循环使用;随意开启消防龙头用水;老式便器水箱容量过大;洗衣服时不用手搓而只用洗衣机;用自来水冲洗道路;在公共浴室洗完澡后“人离水未关”;解冻海鲜使用“自来水常流法”。水呀,在人们的手指逢间悄悄流走了。“涓涓细流汇成大海”,谁也不陌生,可我说一滴水也同样重要,大家肯定会嗤之以鼻,别说一滴水,一杯水、一盆水都看不上眼。可你曾算过,要是我们中国每人每天节约一滴水,就是13亿滴水,也就是1300升水,那么一年可以节约474500升水,它可以让一片荒原变成绿地。多么触目惊心的一个数字啊,我们怎能任意地浪费每一滴水呢?我真想大声地疾呼,让我们节约每一滴水吧,我们只有节约每一滴水,植物才会苍翠,空气才会清新,天空才会蔚蓝……水,生命之源。我们人类只有拥有了丰富的水资源,人才有生存的绿洲。一则公益广告说得好:如果我们不珍惜每一滴水,那么地球上最后一滴水就是我们的眼泪! 来吧,伙伴们!为了我们幸福的生活,为了我们美好的明天,让我们一起加入节水行列吧!
289 评论(9)

songhuanran

根据我国水力资源复查成果,我国水力资源理论蕴藏量、技术可开发量、经济可开发量都居世界第一,具有举世无双的优势条件,而水电又是可再生能源,属绿色能源。水利工程的利是显而易见的。首先,调节水资源的时间分配,雨季蓄水,枯水季放水,库区民众不再为缺水而烦恼。可以灌溉周围田地,水库里可以搞养殖,增加农民收入。再次,水力发电与火电相比,水电清洁无污染,水是可再生资源,能重复利用。我国南方地区水利发电占据了主导地位。我国经济连续30年持续高增长对电力的需求越来越大,葛洲坝、三峡等工程为经济发展提供了强有力的保证。西电东送是新世纪的大工程之一,填补东部的电力缺口,离开了水力发电是不行的。从这点来说,修筑水坝建设水利工程发电是不可或缺的。  修建水利水电工程是为了改造自然,造福人类,虽然对环境会产生一定的影响,例如淹没问题、水资源的问题、河流的生态问题、移民问题,甚至会引发某些灾害,但只要采取必要的对策措施就完全能够将这种不利影响减少到最低程度。就我国现状来说,修建水利工程是必然的,但是我们又不能不重视环境问题的发展。  所以,现在我们应该坚持的是对环境影响利大于弊的水坝工程,可以改善环境,应该积极建设。对环境影响利弊相当,但工程的资源、社会效益巨大,综合来看有利于社会可持续发展的,根据环境是可以改变的原则应容许其上马。对环境有严重影响、破坏生态环境的水坝工程,应该坚决反对。
281 评论(15)

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