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
It was once thought that air pollution affected only the area immediately around large cities with factories or heavy automobile
It was once thought that air pollution affected only the area immediately around large cities with factories or heavy automobile
admin
2011-01-21
24
问题
It was once thought that air pollution affected only the area immediately around large cities with factories or heavy automobile traffic. Today, we know that although these are the areas with the worst air pollution, the problem is literally worldwide. On several occasions over the past decade, a heavy cloud of air pollution had covered the entire eastern half of the United States and led to health warnings even in rural areas away from any major concentration of manufacturing and automobile traffic. In fact, the very climate of the entire earth may be affected by air pollution. Some scientists feel that the increasing concentration of carbon dioxide in the air resulting from the burning of fossil fuels (coal and oil) is creating a "greenhouse effect"--holding in heat reflected from the earth and raising the world’s average temperature. If this view is correct and the world’s temperature is raised only a few degrees, much of the polar ice cap will melt and cities such as New York, Boston, Miami and New Orleans will be under water.
Another view, less widely held, is that increasing particulate matter in the atmosphere is blocking sunlight and lowering the earth’s temperature--a result that would be equally disastrous. A drop of just a few degrees could create something close to a new ice age, and would make agriculture difficult or impossible in many of our top farming areas. At present we do not know for sure that either of these conditions will happen (though one recent government report prepared by experts in the field concluded that the greenhouse effect is very likely). Perhaps, if we are very lucky, the two tendencies will offset each other and the world’s temperature will stay about the same as it is now.
As far as the greenhouse effect is concerned, the author _____.
选项
A、shares the same view with the scientists
B、is uncertain of its occurrence
C、rejects it as being ungrounded
D、thinks that it will destroy the world soon
答案
B
解析
本题考察作者对“温室效应”(greenhouse effect)的态度。文中If this view is correct...表明作者的不确定态度,既不完全肯定又不彻底否定,故而A、C均不正确,也未表明“温室效应”会很快摧毁世界。
转载请注明原文地址:https://kaotiyun.com/show/MX3d777K
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
ThehistoryofEnglishisconventionally,ifperhapstooneatly,dividedintothreeperiodsusuallycalledOld(orAnglo-Saxon)E
ManyforeignerswhohavenotvisitedBritaincallalltheinhabitantsEnglish,fortheyareusedtothinkingoftheBritishIsle
ManyforeignerswhohavenotvisitedBritaincallalltheinhabitantsEnglish,fortheyareusedtothinkingoftheBritishIsle
ManyforeignerswhohavenotvisitedBritaincallalltheinhabitantsEnglish,fortheyareusedtothinkingoftheBritishIsle
9.5本题考查考生对于具体数字信息的听辨能力。原句为“...hopingthatbylearninghowthedisordertakesroot,theycanfindwaystokeepitfromgrowinginto
Computersarenowbeingpushedintoschools.Weknowthatmultimediawillmake【C1】______easyandfun.Childrenwillhappilylear
Tounderstandhowastrologyworks,weshouldfirsttakeaquicklookatthesky.Althoughthestarsareatenormousdistances,t
Tounderstandhowastrologyworks,weshouldfirsttakeaquicklookatthesky.Althoughthestarsareatenormousdistances,t
Whydidthewomanopenthedoorwhensomeoneknockedatit?
Amongtheraftofbooks,articles,jokes,romanticcomedies,self-helpguidesandotherwritingsdiscussingmarriage,somefamil
随机试题
汽车维修市场预测的实质是一种科学活动,依赖于科学的_______和_______、可靠的资料、先进的计算手段,得出科学的_______分析。
某农户的一头3岁母牛突然死亡,生前没有发现异常表现,病因不明,死后尸体腹部严重膨胀,尸僵不全,天然孔出血,血液凝固不良。该病病原体的重要特点是
患者女,39岁。左侧颞下颌关节弹响15年,伴关节区疼痛5年。临床检查:咬合关系正常,开口度约2指,开口型向左偏,左侧髁突的活动度小于右侧髁突,左侧关节区可扪及连续的破碎音。经上述检查,若诊断为不可复I生左侧关节盘前移位,则在经关节中间层面关节上腔造影侧
某搬运工从楼下搬重物上楼,作业时氧需超过了氧上限,其劳动强度属于()。
高层建筑内设有中庭,当面积上下连通计算超过一个防火分区面积时,下列说法正确的是:
建设单位应当自工程竣工验收合格之日起()d内,依照《房屋建筑工程和市政基础设施工程竣工验收备案管理暂行办法》规定,向工程所在地的县级以上地方人民政府建设行政主管部门备案。
下列各项中,可按委托加工应税消费品的规定征收消费税的有()。
期初未分配利润有贷方余额,期末获利的情况下,计提盈余公积时,要包含期初的贷方余额。()
在考生文件夹下完成如下简单应用:1.modil.prg程序文件中SQLSELECT语句的功能是查询目前用于3个项目的零件(零件名称),并将结果按升序存入文本文件results.txt中。给出的SQLSELECT语句中在第1、3、5行各有一处错误,
MostbanksintheUSopenat9:00or10:00andclosebetween3:00and5:00,butstayopenlateronFridays,andsomebankshave
最新回复
(
0
)