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
America is in no immediate danger of "running out of water". People in the West have been aware that water is a precious commodi
America is in no immediate danger of "running out of water". People in the West have been aware that water is a precious commodi
admin
2022-09-23
68
问题
America is in no immediate danger of "running out of water". People in the West have been aware that water is a precious commodity and must be conserved. In the damp East, an excess of water led to complacency until two factors created concern over our water supply. First, the periods of drought from 1961 to 1966 in the Northeast affected crop production and used up the surface and ground water supplies. Second, attention was called to rapid increases in the rates of pollution of these waters resulting from increased urban and industrial growth. As a result, there is an increasing awareness of the need for conserving the quantity and quality of our nation’s water supplies.
Water is a renewable resource, but it is not exhaustible. When used for municipal, industrial, or agricultural purposes, it is not destroyed, but generally finds its way back into our water supply. This used water now carries some waste materials. These dirty waters are often dumped into large bodies of water or are disposed of on land. In the latter instance, evaporation concentrates some of the wastes on the soil surface. On the other hand, water moving through the soil will eventually carry some of the wastes down into the ground water supplies. Eventually, all water evaporates and later returns to the earth as rain or snow in a relatively purer state.
Through this never-ending cycle, there is just as much water in this country now as there ever was. The amount, however, does not increase. Our rapid population growth and our agricultural and industrial expansion have caused our water needs to soar. By withdrawing water from streams too quickly, we have in some instances upset the balance of nature’s built-in renewal processes for conserving water. As a result, some of our streams and lakes have become "wet deserts. " There is still plenty of water in them, but its water is so polluted that it supports almost no life at all.
The passage is mainly about________.
选项
A、water resources of the United States
B、the renewal processes of water in nature
C、the importance of water conservation
D、water pollution in America
答案
C
解析
主旨题。文章第一段的最后一句“As a result,there is an increasing awareness of the need for conserving the quantity and quality of our nation’s water supplies. ”是文章的中心思想,指出人们越来越意识到保护水的量和质的必要性。第二、第三段主要讨论节约用水和水污染的危害。第二段指出,水虽然是一种可再生的资源,但并不是用之不竭;第三段说,人口的急剧增加,工农业的快速发展使得用水需求高涨并造成严重的水污染。综上所述,我们可以看出,文章主要讨论保护水资源的重要性。A选项“美国的水资源”,B选项“自然界水资源的更新进程”,D选项“美国的水污染”都是以偏概全。
转载请注明原文地址:https://kaotiyun.com/show/gNNd777K
本试题收录于:
公共英语三级笔试题库公共英语(PETS)分类
0
公共英语三级笔试
公共英语(PETS)
相关试题推荐
Everyobjecttellsastory.Eventhemostordinaryobjectscanpresentuswithpowerfulimages.Sometimesitistheordinarynat
Whydidthewomantalktotheprofessor?
Whatdowelearnfromtheconversation?
Whatdowelearnfromtheconversation?
Youwanttohelpyourfriendtogetajobinauniversity.Writealetterofrecommendationabout120wordsincludingthefollow
Aresomepeoplebornclever,andothersbornstupid?Orisintelligencedevelopedbyourenvironmentandourexperience?Strange
Aresomepeoplebornclever,andothersbornstupid?Orisintelligencedevelopedbyourenvironmentandourexperience?Strange
Shoppingforclothesisnotthesameexperienceforamanasitisforawoman.Amangoesshoppingbecauseheneedssomething.
Everybodygetssick.Diseaseandinjurymakeussufferthroughoutourlivesuntil,finally,someattackonthebodybringsour
Womenwithlowliteracysufferdisproportionatelymorethanmen,encounteringmore【C6】________infindingawell-payingjobandb
随机试题
采用轨模式摊铺机施工时,基层宽度应比混凝土面板每侧宽出()cm。
梦遗与滑精的鉴别点为
最多可容纳2个电子的壳层是
在计算个人所得税时,下列各项中允许税前全额扣除的是()。
近代传统音乐品种中职业化程度最高的是()。
在西欧,19世纪末到20世纪40年代的外语教学,翻译法占统治地位。
2,7,22,67,202,()。
许多杂志有两种版面——免费的电子版和花钱购买的纸质版。杂志电子版的出现使得纸质版的读者迅速流失,而电子版的广告收入有限,杂志经济收益大幅下降。如果不出电子版,杂志的影响力会大大下降。如果对电子版收费,很多读者很可能会转而阅读其他电子杂志。要让读者心甘情愿地
计算数列第n项的函数定义如下:intfa(intn){if(n==1)return1;elsereturn3*fa(n一1)+2;若执行函数调用表达式fa(4)时,返回的函数值为()。
如果要在VBA中打开一个窗体,可使用()对象的OpenForm方法。
最新回复
(
0
)