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
If you live in a city in North America or Europe, you have probably never thought much about water. Whenever you need some, you
If you live in a city in North America or Europe, you have probably never thought much about water. Whenever you need some, you
admin
2013-06-02
60
问题
If you live in a city in North America or Europe, you have probably never thought much about water. Whenever you need some, you turn on the tap and there it is. Millions of people in other parts of the world are not so lucky. They have trouble getting enough clean water for their basic needs. This situation may soon become common all around the world, scientists believe. In fact, they say that the lack of clean water may be one of the biggest issues in the twenty-first century.
The reasons for this are clear. On the one hand. people are using more water than ever before. Over the last fifty years, the population of the world has more than doubled. On the other hand, many sources of surface water such as rivers, lakes, and streams are too polluted and unhealthy for use as drinking water.
This has forced more and more people to drill wells so they can get water form underground. There are enormous amounts of water deep underground in lakes called aquifers. Until recently, scientists believed this underground water was safe from pollution. Then, in the 1980s. people in the United States began to find chemicals in their well water, and scientists took a closer look at what was happening. Weldon Spring, Missouri, for example, was the site of a bomb factory during World War Ⅱ. The factory was destroyed after the war. but poisonous chemicals remained on the ground. Very slowly, these chemicals dripped down through the ground and into the aquifer. Once they did, however, the water form that aquifer was no longer drinkable.
It probably never will be drinkable again, Underground water is not renewed regularly by the rain, like lake or river water. Thus, if a harmful chemical gets into an aquifer, it will stay there for a very long time. Furthermore, it is nearly imp6ssible to remove all the water in an aquifer and clean out the pollutants.
Industrial sites like Weldon Spring are one cause of underground water pollution. There are thousands of such sites in the United States alone, and many others around the world. Underground water pollution is also caused by modern farming methods, which require the use of large amounts of chemicals in the fields. And finally, yet another important cause of underground water pollution is waste. That includes solid waste thrown away in dumps and landfills, and also untreated human and animal waste.
The situation is indeed very serious. Fortunately, there are many aquifers and they are very large. Only a small number have been seriously damaged so far. But if the world does not want to go thirsty in the near future, further pollution must be prevented. Around the world, governments must make real changes in industry, agriculture, and waste disposal.
In the first paragraph scientists express the idea that ______.
选项
A、clean water is no longer available for people in Europe
B、there will always be enough water for everyone
C、the water problem will soon be resolved in the twenty-first century
D、many more people may soon. be without clean water
答案
D
解析
细节推断题。请看上下文“They have trouble getting enough clean water for their basic needs.This situation may soon become common all around the world,...lack of clean water may be one of the biggest issues in the twenty-first century”,由此可推断将有越来越多的人喝不上、用不上干净的水,故正确答案D项。
转载请注明原文地址:https://kaotiyun.com/show/Fu67777K
0
大学英语六级
相关试题推荐
A、Becauseonlyrichpeoplecanaffordthewatches.B、Becausethewatchesweremademanyyearsago.C、Becauseonlyafewwatches
Nowadays,incominggenerationsreallyrelynowonthepowerofthe"Internet"whenitcomestosearchingforinformation.Justt
Havingbroughttheopportunitiesfordevelopment,theeconomicglobalization____________________(增加了国际环境的不确定性,也增加了亚太地区内经济体结构调整的难
A、Becausetheyarealike.B、Becausetheman’sbriefcasehasalock.C、Becausetheman’sbriefcaseissmaller.D、Becauseshedoes
AdamRappoporthasthesamefamiliaritywithakeyboardaswellasthetouch-tonepadonthephone.Thecellphoneindustrysay
A、Anessay,B、AmagazinearticleC、Apoem.D、Ashortstory.DWhatmustthestudentsreadforWednesday?该题是就学生星期三的阅读作业提问。根据短文中的Y
Whenyouaredevelopingathesis,remember______(不要包含和话题无关的内容)
Ifyouwanttolivelongerandlowertheriskofheartdisease,amovetothemountainsmayhelp.ResearchbyscientistsinGree
ScientistsWorryMachinesMayOutsmartManArobotthatcanopendoorsandfindelectricaloutletstorechargeitself.Compu
A、Workitself.B、Careeradvancement.C、Thesymbolsofsuccess.D、Socialidentity.A文中关键句为“Careeristsarenotsomuchintoworka
随机试题
【背景资料】某房屋建筑工程施工总承包二级企业,通过招标投标方式承建了城区A住宅楼工程,工程为框架一剪力墙结构,地上17层,地下1层,总建筑面积为16780m2。该工程采取施工总承包方式,合同约定工期20个月。工程中标后,施工企业负责人
导致中国民族资产阶级两面性的决定因素,是天生的()
突发性聋的病因包括
A.水丸B.蜜丸C.水蜜丸D.糊丸E.蜡丸以蜂蜡为辅料用于制备()。
在宋代,提点刑狱司在巡视某州县时,发现某案审判过程中,地方官吏有违法的行为,该提点刑狱司可以怎样做?
某工程采用暂估工程量固定单价合同,在施工阶段,导致业主方合同价格风险的主要因素有()
某公司拟在沿海地区选址建厂,合作期限10年,基准收益率为12%。经过收集有关数据,确定了两个厂址选择方案,现给出了4个评价厂址方案的指标:劳动力素质、运输条件、基础设施和投资政策。权重分别为0.25、0.35、0.15和0.25。分项评价结果如表1所示
狭义的单证在货物运输中就是()。
在我国,警察和军队、法庭、监狱一样,是国家的暴力工具,而这种暴力工具,主要是通过其()体现出来的。
当使用进程创建原语创建进程时,下列选项中表示的顺序是正确的是()。
最新回复
(
0
)