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 and/or heavy automo
It was once thought that air pollution affected only the area immediately around large cities with factories and/or heavy automo
admin
2010-03-26
79
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.
The word "offset" in the second paragraph could best be replaced by ______.
选项
A、slip into
B、make up for
C、set up
D、catch up with
答案
B
解析
词汇判断题。offset意为“抵消,补偿”,与make up for同义。
转载请注明原文地址:https://kaotiyun.com/show/nck7777K
0
大学英语四级
相关试题推荐
A、Theyfeelenjoyable.B、Theyfeelsafeinbigcities.C、Theyfeelunproductiveandlonely.D、Theyfeelfree.C[听力原文]Howdoman
A、Findherwayaround.B、Enjoyherselfthoroughly.C、Remembertheculture.D、Seethedifference.D[听力原文]W:I’mgoingtoIndian
A、Thesefactoriesproducedmachinesinthepast.B、Thesefactoriesproducedfarmtoolsinthepast.C、Thesefactoriesmanufac
Whatdopeopleusuallydowhentheirpetsarethoughttohavebehaviorproblems?Sinceit’smoredifficulttosolveseriousani
Whatdopeopleusuallydowhentheirpetsarethoughttohavebehaviorproblems?Inordertohelpyourlittlepetdogdevelopg
Whatdopeopleusuallydowhentheirpetsarethoughttohavebehaviorproblems?Whenapetdogeliminatesinthehousewhilei
Whatdopeopleusuallydowhentheirpetsarethoughttohavebehaviorproblems?Whenapetscratchesonanewsofa,hisowner
CopingwithStressInmoderntimes,wehumanbeingshavetousethoughtsandactionstodealwithstressfulsituationsandlo
随机试题
箱形梁主要用于同时受到水平和垂直弯矩或扭矩作用时的工作状况。()
左心室增大可呈现以下X线征象,但除外
下列属于带下过多的病机是
下列属于柔性防水施工的有()。
塑料制个人用烟盒
若两个不同公司的甲车和乙车在行驶中发生相撞。甲车车辆损失5000元,车上货物损失10000元,乙车车辆损失4000元,车上货物损失5000元。交通管理部门裁定甲车负主要责任,承担经济损失70%;乙车负次要责任,承担经济损失30%。这两辆车都投保了车辆损失险
采用标准法计量操作风险监管资本时,公司金融这类业务条线的操作风险资本要求系数β为()。
下列不属于《义务教育化学课程标准(2011年版)》规定的基础学生实验的是()。
不等式(1-|x|)(1+x)>0成立。(1)|x|<1(2)r<-1
若有以下程序typedefstructstu{charname[10],gender;intscore;)STU;voidf(char*P){strcpy(P,"Qian");}main(){STUa={"Zhao
最新回复
(
0
)