首页
登录
职称英语
[originaltext] The world is not only hungry; it is also thirsty for water. Th
[originaltext] The world is not only hungry; it is also thirsty for water. Th
游客
2023-09-01
32
管理
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 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 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、By filtering sea water.
B、By treating sea water with chemicals.
C、By taking salt out of sea water.
D、By drying up sea water.
答案
C
解析
How can sea water be turned into fresh water?
信息明示题。由文章最后可知,要将海水变为淡水必须去除海水中的盐,所以C正确。
转载请注明原文地址:https://tihaiku.com/zcyy/2975879.html
相关试题推荐
[originaltext]Asia-Pacificconsumersaretheworld’smostactiveonlinesho
[originaltext]Asia-Pacificconsumersaretheworld’smostactiveonlinesho
[originaltext]M:Weareluckytohaveinthestudiotoday,MollyTaylor.Molly
[originaltext]M:Weareluckytohaveinthestudiotoday,MollyTaylor.Molly
[originaltext]M:Weareluckytohaveinthestudiotoday,MollyTaylor.Molly
[originaltext]M:VictoriaZackheimistheeditorofthebookseriesTheOtherW
[originaltext]M:VictoriaZackheimistheeditorofthebookseriesTheOtherW
[originaltext]M:VictoriaZackheimistheeditorofthebookseriesTheOtherW
[originaltext]W:Thecompetitionscheduledfortodayhasbeencancelled.Theho
[originaltext]W:Thecompetitionscheduledfortodayhasbeencancelled.Theho
随机试题
Wealllaugh.Weallhurt.Weallmakemistakes.Wealldream,That’slife.
不属于道路路面种类的是()A.石材路面 B.普通混凝土路面 C.钢筋混
男性,30岁,2天来排柏油样便多次,今晨起床时晕倒来诊,既往无上腹痛和肝病史。查
对“商业企业管理”进行主题标引,正确的是()。A.商业-企业-管理 B.商业
伤寒病儿发病1周以内常规进行的培养是A.血培养 B.粪便培养 C.咽拭子培养
张先生夫妇今年均已40岁,家里存款在50万元左右。他和妻子两个人每月收入大约1万
从所给的四个选项中,选择最合适的一个填入问号处,使之呈现一定的规律性: A.如
不用炒黄法炮制的是()。A.牛蒡子B.酸枣仁C.牵牛子D.荆芥E.苍耳子
根据上图,下列选项错误的是:() A.与2007年相比,2008年工业地价
A.中性粒细胞 B.淋巴细胞 C.巨噬细胞 D.嗜酸性粒细胞 E.浆细胞
最新回复
(
0
)