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
2024-02-28
6
管理
问题
It was once thought that air pollution affected only the area immediately around large cities with factories and/or heavy automobiles(汽车)traffic. Today, we know that although these are the areas with the worst air pollution, the problem is literally(简直地 )worldwide. On several occasions over file 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 resulting from the burning of fossil(化石)fuels (com 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(极地的) ice cap will much 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 fanning 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] This passage is primarily concerned with______.
选项
A、the greenhouse effect
B、the bunting of fossil fuels
C、the potential effect of air pollution
D、the likelihood of a new ice age
答案
C
解析
主旨题。本题问的是:这篇文章是主要关于______。需要综合全文内容,进行归纳和推理。本文论述了可能发生的温室效应和新冰河时代均为空气污染造成的潜在后果。故选C。
转载请注明原文地址:https://tihaiku.com/zcyy/3488866.html
相关试题推荐
Thehistoryofmodernwaterpollutiongoes【C1】______toFebruary20,1931,
Thehistoryofmodernwaterpollutiongoes【C1】______toFebruary20,1931,
Thehistoryofmodernwaterpollutiongoes【C1】______toFebruary20,1931,
Thehistoryofmodernwaterpollutiongoes【C1】______toFebruary20,1931,
Thehistoryofmodernwaterpollutiongoes【C1】______toFebruary20,1931,
Thehistoryofmodernwaterpollutiongoes【C1】______toFebruary20,1931,
Thehistoryofmodernwaterpollutiongoes【C1】______toFebruary20,1931,
Thehistoryofmodernwaterpollutiongoes【C1】______toFebruary20,1931,
Thehistoryofmodernwaterpollutiongoes【C1】______toFebruary20,1931,
Thehistoryofmodernwaterpollutiongoes【C1】______toFebruary20,1931,
随机试题
孔子(Confucius)是一位思想家、政治家、教育家,也是中国儒学思想的创始人。儒学(Confucianism),这个道德和宗教哲学的大系统建立在孔圣人
WhichofthefollowingisINCORRECT?A、Thelastmen.B、Lotsoffood.C、Anumbero
图示受扭空心圆轴横截面上的切应力分布图中,正确的是:
在混凝土中掺入纤维材料的主要作用有()。A:微观补强 B:减少塑性裂缝 C
代谢性酸中毒的特征是A.HCO3-下降,pH下降,PaCO2正常 B.HCO3
A.下痢时发时止,夹有赤白黏冻 B.痢下赤白黏冻,白多赤少 C.下痢日久不愈
关于玻璃仪器清洗时使用的铬酸洗液叙述不正确的是A.当仪器油污过多或经长期存放未用
将糖皮质激素C位羟基酯化的目的是A.增加抗炎活性 B.增加稳定性 C.降低水
在教育宗旨问题上,梁启超主张通过教育培养A.政治家 B.学术人才 C.新国民
工程量清单计价的基础公式正确的是()。A.分部分项工程费=∑(分部分项工程量*
最新回复
(
0
)