首页
登录
职称英语
There was one thought that air pollution affected only the area immediately
There was one thought that air pollution affected only the area immediately
游客
2025-03-14
41
管理
问题
There was one thought that air pollution affected only the area immediately around large cities with factories and heavy automobile traffic.At present, we realize that although these are the areas with the worst air pollution, the problem is literally worldwide. (76) On several occasions over the past decade, a heavy cloud of air pollution has covered the east of the United States and brought health warnings in rural areas away from any major concentration of manufacturing and automobile traffic.In fact, the very climate of the entire earth may be infected by air pollution. Some scientists consider 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"--conserving 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 in water.
(77) Another view, less widely held, is that increasing particular 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 fanning areas. Today we do not know for sure that either of these conditions will happen (though one recent government report drafted by exports in the field concluded that the greenhouse effect is very possible). Perhaps, if we are lucky enough, the two tendencies will offset each other and the world’s temperature will stay about the same as it is now. [br] It can be concluded that _________.
选项
A、raising the world’s temperature only a few degrees would not do much harm to life on earth
B、lowering the world’s temperature merely a few degrees would lead many major farming areas to disaster
C、almost no temperature variations have occurred over the past decade
D、the world’s temperature will remain constant in the years to come
答案
B
解析
推理判断题。文章第二段第二句提到降温几度就能导致农业生产困难甚至无法生产,这对农业来说无疑是巨大的灾难,所以B正确;根据第一段,温室效应可能导致南极的冰雪融化,将纽约等城市淹没,所以A(全球变暖不会给地球生活带来危害)是不正确的;根据常识,近几十年气温在逐渐升高,所以c也不对;作者在文中提到空气污染严重影响全球气温的变化,所以只要污染存在,气温就不可能恒定不变,D说得太绝对了。
转载请注明原文地址:https://tihaiku.com/zcyy/3996962.html
相关试题推荐
Discoveriesinscienceandtechnologyarethoughtby"untaughtminds"tocom
Discoveriesinscienceandtechnologyarethoughtby"untaughtminds"tocom
Discoveriesinscienceandtechnologyarethoughtby"untaughtminds"tocom
InevertrustedhimbecauseIalwaysthoughtofhimassucha______character.A、g
Immediatelytheradiomessagewasreceived,threeshipschangedtheir______andm
Ihopealltheprecautionsagainstairpollution,______aresuggestedbytheloca
Iknowanumberofoccasions______peoplediedfromwaterpollution.A、howB、as
(It)is(important)thatshe(goesto)seethedoctor(immediately).A、ItB、impor
Thecompanyofficial______Ithoughtwouldbefiredreceivedaraise.A、whomB、w
Heneverthoughtthecommitteewould______hisproposal.A、putupB、objecttoC、
随机试题
Whodoyouthinkthisad.isintendedto?Thisadvertisementistargetedat_
[originaltext]Whatisthebestwaytocatchsomeonewhoistellingalie?F
"NewWomenoftheIceAge"Thestatusofwomeninasociet
当样本含量足够大时,样本率又不接近0或1时,以样本率推断总体率95%可信区间的计
教学文言文复习课,教师安排学生总结一些语句中宾语前置的用法。下列例句适合的是(
站用直流电源系统竣工(预)验收标准卡二次接线检查验收要求芯线标志应用线号机打印,
2011年全国全年粮食种植面积11057万公顷,比上年增加70万公顷;棉花种植面
贷款担保的作用主要体现在()。A.协调和稳定商品流转秩序,使国民经济健康运行
城市污水的一级处理主要针对水中悬浮物质,常采用物理的方法,经过一级处理后,污水悬
特纳综合征与哪项有关?( )A.垂体 B.下丘脑 C.子宫 D.卵巢
最新回复
(
0
)