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、People can use nearly 75 percent of it. B、People can use about 97 percent of it. C、People can use exactly 3 percent of it. D、P
A、People can use nearly 75 percent of it. B、People can use about 97 percent of it. C、People can use exactly 3 percent of it. D、P
admin
2009-08-19
35
问题
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. People 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 and glaciers. Even worse, some of it has been polluted.
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. One useful step we should take is to develop ways of reusing it.
Today, in most large cities, water is used only once. But it is possible to pipe water that has been used to a purifying plant. There it can be filtered and treated with chemicals so that it can be used again just as if it were flesh 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 to 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、People can use nearly 75 percent of it.
B、People can use about 97 percent of it.
C、People can use exactly 3 percent of it.
D、People can use less than 3 percent of it.
答案
D
解析
What percentage of the earth’s water can people actually use?
综合推断题。文章提到People can only drink and use the other 3%,再结合后面提到的we cannot even use all of that可知,由于有的水是以冰山和冰河的形式存在的,还有的水被污染了,所以人类能利用的水实际上不到3%,所以D正确。
转载请注明原文地址:https://kaotiyun.com/show/5IdK777K
0
大学英语六级
相关试题推荐
Electriccarsaredirty.Infact,notonlyaretheydirty,theymightevenbedirtierthanthegasoline-poweredcars.Weget
Iwillkeepyou______ofhowourbusinessisgoingon.
InthewintermonthsthetemperatureinmostofCanadausuallystaysbelow0℃.However,insomepartsofCanada,suchassouther
She______(learn)Englishforeightyearsbythetimeshegraduatesfromtheuniversitynextyear.
Weallbelievethatitishardforhimtotakeupother(responsible)_______now.
IbecameateacherbecauseIpreferredbooksandpeople________politics.
Whatarethereinoursocietynowadays?Thereare_________________.
A、ShemayhavesorethroatB、Shemaybeblamed.C、Nothingmayhappen.D、Shemaygethighersalary.BWhatmayhappentoMaryint
A、Hesleptintheoffice.B、Hewentshoppingforaclothes.C、HewenttoMary’shousetoseehim.D、Hedidnothingatall.CWhat
A、Theyarelearningtoboat.B、Theyareplayingagame.C、Theyaremakingamovie.D、TheyaretakingpicturesDM:Stepalittleb
随机试题
下列有关韵文的知识,表述不正确的一项是( )
简述物种形成的过程。
患儿,男性,7岁。咳嗽1周,喘3天,无发热,门诊就诊。下列检查对于诊断最有帮助的是
某孕妇26岁,化验结果为:HBsAg(+),HBeAg(+),抗HBcIgG(+)。妊娠足月生一男婴,对该婴儿接种乙肝疫苗,注射乙肝免疫球蛋白,这一免疫措施属于
乳疬肾阳虚证的用方是乳疬肾阴虚证的用方是
进行银行存款对账的数据主要有()。
中国银行的性质是()。
1,3,2,0,-1,1,(),22
(2010年真题)如图3.21所示,正三角形ABC中,D,E分别是AB,AC上的点,F,G分别是DE,BC的中点,已知BD=8cm,CE=6cm,则FG=[]cm。
Landbelongstothecity;thereis______thingasprivateownershipofland.
最新回复
(
0
)