首页
登录
职称英语
If you live in a city in North America or Europe, you have probably never t
If you live in a city in North America or Europe, you have probably never t
游客
2023-08-30
34
管理
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. [br] This passage is mainly about ______.
选项
A、pollution problems in general
B、people in North America or Europe are living happier than those in other parts
C、people drilling wells to check chemicals in well water
D、underground water pollution
答案
D
解析
主旨题。第一段后半部分引出主旨“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.”。第二段谈及clean water变少的两个主要原因,第三段告诉读者既然可饮用水减少,人们就拼命掘井。然而井水也被污染。第四段说一旦地下水被污染,就不是短时间内可以恢复的。第五段阐述地下水污染的三个主要原因(化学物质、农业和废物)。最后一段再次重申地下水问题的重要性并呼吁全球政府采取措施。因此,正确答案为D项。
转载请注明原文地址:https://tihaiku.com/zcyy/2971242.html
相关试题推荐
Thereisprobablynoplaceanywhereinthe【B1】______worldtodaythatisnot
Thereisprobablynoplaceanywhereinthe【B1】______worldtodaythatisnot
Thereisprobablynoplaceanywhereinthe【B1】______worldtodaythatisnot
Thereisprobablynoplaceanywhereinthe【B1】______worldtodaythatisnot
Thereisprobablynoplaceanywhereinthe【B1】______worldtodaythatisnot
[originaltext]Americancollegesanduniversitiesconsideranumberofthing
[originaltext]Americancollegesanduniversitiesconsideranumberofthing
[originaltext]Americancollegesanduniversitiesconsideranumberofthing
Europeanfootballisplayedin80countries,______(成为世界上最受欢迎的体育项目).whichmakes/m
Goodjobsarescarcethesedays,withroughly15millionAmericansoutofwo
随机试题
Helena:Oh,welcome,comein,please.Jack:______Andhere’sasmallgift.Let
BullyingandChildrenA)Whatyoursonisdescribingisb
人际传播的主要形式是()A.团体内部成员之间的信息交流 B.通过中介进行个人之
关于血清载脂蛋白AⅠ、B测定,下列叙述中错误的是A.目前已有ApoAⅠ、ApoB
下列关于AIDS无症状感染期的叙述,正确的是()A.持续时间较长,可达数年
A.相使 B.相畏 C.相杀 D.相恶 E.相反一种药物的毒性反应或副作
对患有消化性溃疡的患者不适合应用的药物是A.溴隐亭 B.可卡因 C.异烟肼
美国的GDP数据由美国商务部经济分析局(BEA)发布,一般在()月末还进行
下列关于信用合作社和股份制组织的说法中,不正确的是()。A.合作制为自下而上
耐火砖砌筑时,关于膨胀缝的留设,下列说法中正确的是()。A.膨胀缝应该设在受力
最新回复
(
0
)