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
考研
In the following text, some sentences have been removed. For Questions 41-45, choose the most suitable one from the list (A、B、C、
In the following text, some sentences have been removed. For Questions 41-45, choose the most suitable one from the list (A、B、C、
admin
2010-06-17
91
问题
In the following text, some sentences have been removed. For Questions 41-45, choose the most suitable one from the list (A、B、C、D、E、F、G……) to fit into each of the numbered blank. There are several extra choices, which do not fit in any of the gaps. (10 points)
A significant portion of industry and transportation burns fossil fuels, such as gasoline. When these fuels burn, chemicals and particulate matter are released into the atmosphere. Although a vast number of substances contribute to air pollution, the most common air pollutants contain carbon, sulfur, and nitrogen.
(41)______.
Acid rain forms when sulfur dioxide and nitrous oxide transform into sulfuric acid and nitric acid in the atmosphere and come back to Earth in precipitation. Acid rain has made numerous lakes so acidic that they no longer support fish populations.
(42)______.
Estimates suggest that nearly 1.5 billion people worldwide lack safe drinking water and that at least 5 million deaths per year can be attributed to waterborne diseases. Water pollution may come from point sources or nonpoint sources. Point sources discharge pollutants from specific locations, such as factories, sewage treatment plants, and oil tankers. The technology exists to monitor and regulate point sources of pollution, although in some areas this occurs only sporadically. Pollution from nonpoint sources occurs when rainfall or snowmelt moves over and through the ground.
(43)______.
With almost 80 percent of the planet covered by oceans, people have long acted as if those bodies of water could serve as a limitless dumping ground for wastes. However, raw sewage, garbage, and oil spills have begun to overwhelm the diluting capabilities of the oceans, and most coastal waters are now polluted, threatening marine wildlife.
(44)______.
Water that collects beneath the ground is called groundwater. Worldwide, groundwater is 40 times more abundant than fresh water in streams and lakes. In the United States, approximately half the drinking water comes from groundwater. Although groundwater is a renewable resource, reserves replenish relatively slowly. Presently, groundwater in the United States is withdrawn approximately 4 times faster than it is naturally replaced. (45)______.
A. Beaches around the world close regularly, often because the surrounding waters contain high levels of bacteria from sewage disposal.
B. These chemicals interact with one another and with ultraviolet radiation in sunlight in dangerous ways. Smog, usually found in urban areas with large numbers of automobiles, forms when nitrogen oxides react with hydrocarbons in the air to produce aldehydes and ketones. Smog can cause serious health problems.
C. Acid rain is also responsible for the decline of many forest ecosystems worldwide, including Germany’s Black Forest and forests throughout the eastern United States.
D. In addition to groundwater depletion, scientists worry about groundwater contamination, which arises from leaking underground storage tanks, poorly designed industrial waste ponds, and seepage from the deep-well injection of hazardous wastes into underground geologic formations.
E. The Ogallala Aquifer, a huge underground reservoir stretching under eight states of the Great Plains, is drawn down at rates exceeding 100 times the replacement rate. Agricultural practices depending on this source of water need to change within a generation in order to save this groundwater source.
F. As the runoff moves, it picks up and carries away pollutants, such as pesticides and fertilizers, depositing the pollutants into lakes, rivers, wetlands, coastal waters, and even underground sources of drinking water. Pollution arising from nonpoint sources accounts for a majority of the contaminants in streams and lakes.
G. By some estimates, on average, 25 percent of usable groundwater is contaminated, and in some areas as much as 75 percent is contaminated.
选项
答案
C
解析
试题的第2段提到酸雨的形成,C的Acid rain is also responsible for the decline of many forest ecosystems world wide正好与上一段的Acid rain has made numerous lakes so acidic that they no longer support fish populations连贯。
转载请注明原文地址:https://www.kaotiyun.com/show/9v44777K
0
考研英语一
相关试题推荐
Asmanycountriesemergefromlockdowns,researchersarepreparedtousegenomesequencingtoavoidanexpectedsecondwaveofC
WhentheislandofSingaporebecameanindependentcountryin1965,ithadfewfriendsandevenfewernaturalresources.Howdid
DanMillerisa19-year-oldbusinessstudentinLondon.He’salsotheCEOofasocialmediacompanythataimstoreachfivemill
Theyaretwoofthebiggestnamesintechnologyandeachisgrapplingwithahugeandhighlyembarrassingdebacle.OnApril26th
Newfiguresonbusinessconfidencesuggestthattheoneplacewheretheservicesectorboomisontheebbisintheconsumersec
Thoughwemightthinkoffilmasanessentiallyvisualexperience,wereallycannotaffordtounderestimatetheimportanceoffi
Entirecitiesandcountieshavebannedthem.McDonald’sandKFChavedeclaredtogivethemup—ashaveStarbucks,RubyTuesday,a
Entirecitiesandcountieshavebannedthem.McDonald’sandKFChavedeclaredtogivethemup—ashaveStarbucks,RubyTuesday,a
Musicproducesprofoundandlastingchangesinthebrain.Schoolsshouldaddmusicclasses,notcutthem.Nearly20yearsago,a
随机试题
建设有中国特色的社会主义政治文化,要体现社会主义精神文明建设的水平,要具有鲜明的()。
劳动者在付出一定的劳动以后所享有的休息和休养的权利,指的是()
安全检查是安全生产管理工作的一项重要内容,是安全生产工作中发现不安全状况和不安全行为的有效措施,是()的重要手段。
(一)对所有凭证审核签字。(二)设置固定资产类别。编码:01名称:房屋类折旧方法:平均年限法(一)(三)新增“记账凭证”凭证类别。记账凭证的限制类型为“凭证必无”。(四)新增行业。编号:01,名称:机电业。(五)增加职务档案。编码:01,
在下列各项中,既是我国公民的权利,也是我国公民的基本义务的是()。
目前,()是中国移动的第一大收入来源。
试述当代国外课程改革的发展趋势。
小李和小王各有书籍若干本,小李对小王说:“我如果给你2本,我们的书将一样多。”小王说:“我如果给你2本,我的书籍数量将只有你的三分之一。”请问,小李和小王共有书籍多少本?()
A、Youmaygetone.B、Hereyouare.C、At9:15.D、Fiftydollars.D询问价格句型。常用句型为“Howmuch...”。其他句型还有“Howmuchisit?/Howmuchdoes
据说《茉莉花》(JasmineFlower)是流传到海外的第一首中国民歌。许多国外学者在研究中国音乐史时都提到了《茉莉花》,不少外国人学唱中文歌时首选这首歌。2004年雅典奥运会(AthensOlympics)闭幕式上,一位中国小姑娘唱起《茉莉花》,给
最新回复
(
0
)