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
2024-03-01
33
管理
问题
It was once thought that air pollution affected only the area immediately around large cities with factories and/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 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 (二氧化碳) in the air revolting 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 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 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] 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
C
解析
推理判断题。文章中提到了两个不同的观点:一个观点认为二氧化碳的过分集中产生了温室效应,使得地球的平均气温上升;另一个观点认为大气中特殊物质的增多会阻碍阳光,降低地球的温度。作者在第二段中提到到底会发生哪种情况还不确定。因此对于是否会发生温室效应作者也不确定,故选C。
转载请注明原文地址:http://tihaiku.com/zcyy/3494949.html
相关试题推荐
Presentingagiftisathoughtfulaction,butitisnotexpected.Businessg
Presentingagiftisathoughtfulaction,butitisnotexpected.Businessg
Presentingagiftisathoughtfulaction,butitisnotexpected.Businessg
Presentingagiftisathoughtfulaction,butitisnotexpected.Businessg
Presentingagiftisathoughtfulaction,butitisnotexpected.Businessg
Presentingagiftisathoughtfulaction,butitisnotexpected.Businessg
Presentingagiftisathoughtfulaction,butitisnotexpected.Businessg
Presentingagiftisathoughtfulaction,butitisnotexpected.Businessg
Presentingagiftisathoughtfulaction,butitisnotexpected.Businessg
Presentingagiftisathoughtfulaction,butitisnotexpected.Businessg
随机试题
Techniquessuchasobject-orienteddesignandstructuredprogrammingwillhavet
基金托管人职责终止的,应当按照规定聘请()对基金财产进行审计,并将审计结果予以
中国银行保险监督管理委员会成立时间是( )年。A.2015 B.2016
2009年4月,某审计组对乙公司2008年度财务收支进行了审计。有关采购与付款循
护士在护理少尿与无尿患者时,最佳的护理措施是A:口腔护理 B:预防感染 C:
福禄贝尔认为教育的目的在于()。A.遵循儿童的自然成长规律 B.全面发展
( )是采用笔试测验的方法对应聘人员进行初次选拔的活动过程。A.应聘笔试 B
一个人如果没有远大的理想和抱负,而是经常(无所事事),那么他的人生就是没有意义的
关于工作场所劳动保护,下列说法错误的是()。A.用人单位违反规定,劳动者有权拒
背景资料: 某电信工程公司项目部承接到新建35km3孔市内PVC塑料管道工
最新回复
(
0
)