首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
专升本
The world is not only hungry, but it is also thirsty for water. This may seem strange to you, since nearly 70 percent of the ear
The world is not only hungry, but it is also thirsty for water. This may seem strange to you, since nearly 70 percent of the ear
admin
2014-02-25
49
问题
The world is not only hungry, but it is also thirsty for water. This may seem strange to you, since nearly 70 percent of the earth’s surface is covered with water. But about 97 percent of this huge amount is sea water , or salt water. Man can only drink and use the other 3 percent fresh water from rivers, lakes, underground , and other sources. However we cannot even use all of that, because some of them are in the form of icebergs and glaciers(冰川). Even worse, some have been polluted.
However, as things stand today, this small amount of fresh water is still enough for us. But our need for water is increasing rapidly almost day by day. Only if we take steps to deal with this problem now can we a-void a severe worldwide water shortage later on.
We all have to learn how to stop wasting our valuable water. One of the first steps is to develop ways of reusing it.
Today in most large cities, water is used only once and then sent out into a sewer system. From there it returns to the sea or runs into underground storage tanks. But it is possible to pipe used water to a purification(净化)plant. There it can be treated with chemicals so that it can be used again, just as if it were fresh from a spring.
But even if every large city purified and reused its water, we still would not have enough. All we’d have to do is to make use of the vast reserves of sea water in the world and is to remove the salt. If we take these steps we’ll be in no danger of drying up.
The world is thirsty for water because we can only use______percent of the water covering the surface of the earth.
选项
A、3
B、more than 3
C、less than 3
D、97
答案
C
解析
推理判断题。由文章第一段,人类只能利用3%的水,但是我们还不能完全利用这3%,因为一些是冰用,最糟糕的是一部分被污染了。
转载请注明原文地址:https://kaotiyun.com/show/ZkFC777K
本试题收录于:
英语题库普高专升本分类
0
英语
普高专升本
相关试题推荐
Historianscan’ttelluswhen,whereor【71】thefirstfoodwascooked.Inearliest【72】whenpeoplehadeatentheirfood【73】,
Chinese-AmericanstodayhavehigherincomesthanAmericansingeneral.One-fourthofall【36】Chinese-Americansareworkinginsci
Ikeeptellingmyselftoavoid______thesamemistakesinpronunciation.
Thishotel______$60forasingleroomwithbath.
Mr.SmithkeptonAstudyingChineseandBuseitCuntilheDhadmasteredit.
Whetherathomeorinarestaurant,mealsinBrazilaresacred;atimetoeat,butalsotosharepreciousmomentswithfamilyan
When27yearsofage,Burnsfirstattractedliteraryattention,andinthesamemomentsprangtothefirstplaceinScottishlet
Storiesspreadquicklyamonghisfriends______Tomhadlivedonadesertedislandforoverfivemonthsaftertheshipsank.
Infootball,nothingismorevaluablethanthewonderkid.Managersspendplentyoftheirtimesearchingfortheseraregems(室石)
随机试题
关于编制、核改索引的工作,说法错误的是()。
A、脑的加速性损伤B、脑的减速性损伤C、两者均有D、两者均无运动中的头撞到静止的物体______。
女性,38岁,乏力半年,贫血貌。平时月经量多,体检发现子宫肌瘤。化验检查血红蛋白60g/L,白细胞及血小板正常,骨髓增生活跃,以红系增生明显,幼红细胞体积小,红细胞中心淡染区扩大治疗本病最常用的药物是什么
我国禁止进境的与动物防疫相关之物是()。
A.酸枣仁汤B.归脾汤C.五仁丸D.三仁汤E.天王补心丹方中同用酸枣仁、柏子仁,五味子的方剂是
4小时尿量<100ml者不用心脏病孕妇产后出血时禁用
关于《宪法》对人身自由的规定,下列哪一选项是不正确的?(2013年卷一第25题)
建筑工程招标的开标、评标、定标由()依法组织实施。
某市的城市规划方案频繁变更,导致一些企业的房地产项目无法按计划正常进行。该地方政府违反的执法原则是()(2017年非法学综合课单选第10题,2017年法学综合课单选第4题)
Windows环境下,由C++源程序文件编译而成的目标文件的扩展名是
最新回复
(
0
)