首页
登录
职称英语
It was once thought that air pollution affected only the area immediately ar
It was once thought that air pollution affected only the area immediately ar
游客
2024-02-09
23
管理
问题
It was once thought that air pollution affected only the area immediately around large cities with factories and 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 has 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 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. [br] According to the passage, people today think that air pollution______.
选项
A、exists merely in urban and industrial areas
B、may have an effect on the entire earth
C、causes widespread damage in the countryside
D、is not so serious as it used to be
答案
B
解析
细节题。第一段第二句提到,“现今,虽然我们已经知道这些地方的空气污染最为严重,但是空气污染实际上是全球性的问题。”故答案为B。
转载请注明原文地址:https://tihaiku.com/zcyy/3434352.html
相关试题推荐
______(很多人理所当然地认为)marriageisthegoalofeveryyoungwoman’sinmostthought.Man
[originaltext]Somepeoplethoughtbabieswerenotabletolearnthingsunti
[originaltext]Somepeoplethoughtbabieswerenotabletolearnthingsunti
[originaltext]Somepeoplethoughtbabieswerenotabletolearnthingsunti
[originaltext]Scientistshavelongthoughtabouttheideaofreplacingadi
[originaltext]Scientistshavelongthoughtabouttheideaofreplacingadi
Acidrain,whichisaformofairpollution,currentlybecomesasubjectof
Acidrain,whichisaformofairpollution,currentlybecomesasubjectof
Acidrain,whichisaformofairpollution,currentlybecomesasubjectof
Itwasoncethoughtthatairpollutionaffectedonlytheareaimmediatelyar
随机试题
Kateis_______diligentthanherbrother,butshedidn’tpasstheexam.A、noles
[audioFiles]audio_eufm_j90_001(20082)[/audioFiles]A、Themancannotgraduatefro
急性盆腔炎采取的处理中,以下错误的是A.半卧位休息 B.补充营养及液体,纠正水
相对生物利用度是A.制剂中药物被机体利用的速度与程度 B.同一种药物不同制剂之
金砖国家领导人第九次会晤在厦门国际会议中心举行,这次会晤的主题是:A.深化金砖伙
企业培训制度的基本内容不包括()。A:制定员工培训制度的依据 B:实施员
圆管紊流核心区的流速是如何分布的? A.直线分布B.抛物线分布C.对数曲线
电脑“千年虫”的风险,使世界各地的商业银行为此支付了巨额费用。这一风险属于()引
甲公司下列业务中影响企业现金流量的是()。A.用银行存款购入三个月到期的国
某石油化工厂气体分离装置丙烷管线泄漏发生火灾,消防人员接警后迅速赶赴现场扑救,下
最新回复
(
0
)