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 th
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 th
admin
2012-12-22
12
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 the 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/oZFd777K
本试题收录于:
职称英语综合类B级题库职称英语分类
0
职称英语综合类B级
职称英语
相关试题推荐
A.OntheFourthLevel,ConsumersSpendMoreonLuxuriesAndPersonalServicesB.AGoodServiceIsRelatedto"PhysicalSatisfa
"Youwantmetosendinthreementodigtheboxup,withoutmakingasound,andgetridofitproperly?"
HowDidSheConquertheAmericans?African-AmericantalkshowqueenOprahWinfreyistheworld’smostpowerfulcelebrity,acc
WhatfactorcanbeattributedtoGermanprosperity?WhichofthefollowingisNOTtrueoftraditionaluniversityresearch?
Thehazeofpollutionmentionedinthefirstparagraphisacloud______.WhatdidPricenotdoduringherresearch?
Theindexisthegovernment’schiefgauaeoffutureeconomicactivity.
PlantsinDesertOnlyspecialplantscansurvivetheterribleclimateofadesert,fortheseareregionswheretheannualra
IntellectualPropertyRightsInformationtechnologyhaspresentedlegislatorsandlawyers—andyou—withsomenewethicalques
Thenurseryisbrightandcheerful.
Itisimpliedinthepassagethatsuperstitiouspracticesstemmedfromsailorsandfishermen’sfearfortheunreliabilityofnat
随机试题
A.3.8~4.4B.5.0~6.5C.4.0~4.7D.5.0~5.5E.6.5~7.0正常阴道pH为:
《婚姻法》第7条规定:直系血亲和三代以内的旁系血亲禁止结婚。但拟制直系血亲是否应当禁婚,婚姻法没有规定。刘法官在审理一起拟制直系血亲通婚案件时,主张该案应当比照《婚姻法》第7条规定对拟制直系血亲通婚应予禁止并作出婚姻无效的判决。刘法官所运用的法律推理是
某仓库2001年全年仓储营业收入总额为180万元,年初流动资金余额为37万元,年末流动资金余额为35万元,计划流动资金周转天数为90天,2000年流动资金周转天数为96天,要求计算:(1)2001年流动资金周转次数和周转天数;(2)由于流动资金周转速度加快
目前认为131I治疗甲亢最值得注意的晚期并发症是
气性坏疽患者的伤口特点是
患者,男性,20岁。在一次体检中发现HBsAg阳性,当时无自觉症状及体征,肝功能正常。次年5月,因突然乏力、恶心、厌食、尿黄而入院。化验:ALT500U,血清总胆红素85μmol/L,抗-HAVIgM(+)。该患者的诊断可能为
胶囊剂含量测定结果计算式应为
图中所示热型为
我国《刑法》规定:在犯罪活动中,自动放弃犯罪或者自动有效地防止犯罪结果发生的,是犯罪中止。根据上述定义,下列行为中属于犯罪中止的是:
OneafternooninJanuary1989,SusanSharp,43,andher8-year-oldson,David,werewalkinghard【C1】______anicyparkinglot,【C2
最新回复
(
0
)