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
外语
A Thirsty World The world is not only hungry, it is also thirsty for water. This may seem strange to you, since nearly 75% of ti
A Thirsty World The world is not only hungry, it is also thirsty for water. This may seem strange to you, since nearly 75% of ti
admin
2009-06-15
38
问题
A Thirsty World
The world is not only hungry, it is also thirsty for water. This may seem strange to you, since nearly 75% of tile earth’s surface is covered with water. But about 97% of this huge amount is sea-water, or salt water. Man can only drink and use the other 3%-the fresh water that comes from rivers, lakes, underground, and other sources. And we cannot even use all of that, because some of it Is in the form of icebergs (冰山) and glaciers (冰川). Even worse, some of it has been polluted.
At the moment, this small amount of fresh water is still enough for us. However, our need for water is increasing rapidly. Only if we take steps to deal with this problem now can we avoid a severe worldwide water shortage later on. A limited water supply would have a bad effect on agriculture and industry.
In addition to stopping wasting our precious water, one useful step we should take is to develop ways of reusing it, Experiments have already been done in this field, but only on a small scale.
Today, in most large cities, water is used only once and it eventually returns to the sea or runs into underground storage tanks. But it is possible to pipe water that has been used to a purifying (净化) plant. There it can be filtered (过滤) and 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. Where could we turn next? To the oceans! All we’d have to do to make use of the vast amount of sea-water is-remove the salt. This salt-removing process is already in use in many parts of the world.
So if we take all these steps, we’ll be in no danger of drying up!
选项
A、man.
B、you.
C、woman.
D、they.
答案
A
解析
转载请注明原文地址:https://kaotiyun.com/show/TrQd777K
本试题收录于:
职称英语理工类B级题库职称英语分类
0
职称英语理工类B级
职称英语
相关试题推荐
Decidingonthevacation’sdestination(目的地)withyourfamilycanbeadifficulttask,especiallywhenyourchoiceofplacedoesn
Britishteenagersaredamagingtheirhealthbynotgettingenoughsleepbecausetheyaredistractedbyelectronicgadgetsinthe
Themajorityofpeople,aboutnineoutoften,areright-handed.Notuntilrecently,peoplewhowereleft-handedwereconsidered
Beforetheinventionofphotoengraving,steelandcopperplateengravingservedastheprincipalmeansofreproducingillustratio
Bythetimehewastenyearsold,BeniaminOliverDavisJr.hadalreadydecidedhiscareerwouldbeintheairforce.
Whatformofpotatoisthemostnutrienttothehumanbody?Forwhatapurposedidtheresearchersuserawpotatostarchinthe
Whatdoestherecentpollshow?WhichofthefollowingisNOTtrueaboutacontemporarymarriedcouple?
Organicfood:Why?1.Europeisnowthebiggestmarketfororganicfoodintheworld,expandingby25percentayearoverth
StomachUlcerStomachulcersarethecauseofseverepainformanypeople.Doctorshavebeenabletohelplessenthepainof
StomachUlcerStomachulcersarethecauseofseverepainformanypeople.Doctorshavebeenabletohelplessenthepainof
随机试题
滤波器的作用是什么?主要特征有哪些?
如果未选定任何文本,用退格键只能删除插入点前面的字符。()
哪项急性风湿病变伴发心肌炎的几率最低
设定和实施行政处罚必须以事实为依据,与违法行为的()相当。
决定教育领导权的社会因素是()。
2017年全国举办马拉松赛事达1102场,其中,中国田径协会举办的A类赛事223场,B类赛事33场。2017年马拉松赛事的参与人次达到了498万人次,2016年、2015年马拉松赛事的参与人次分别为280万人次、150万人次
咨议局
下列关于唐代与中国交往密切的南部国家的分类,正确的一项是()。①林邑②真腊③骠国④波斯
考生文件夹下存在一个数据库文件“samp2.accdb”,里面已经设计好“tEmp”和“tGrp”两个关联表对象及表对象“tBmp”和“tTmp”。试按以下要求完成设计:创建一个查询,将表“tBmp”中“编号”字段值均在前面增加“05”两个字符,所建查
Thesedayswearesoaccustomedtotelegraphmessages(31)itishardforustoimaginetheexcitementthatwasfeltinthenine
最新回复
(
0
)