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
18
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] 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
B
解析
作者态度题。本题问的是:就温室效应而言,作者______。根据文章第2段第3句“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)”,可知目前我们不确定这两种情况哪种会发生(虽然最近一份由这一领域专家提供的政府报告说温室效应极有可能发生儿由此可见,作者对温室效应是否会发生并不确定,故选B。
转载请注明原文地址:https://tihaiku.com/zcyy/3488863.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
FoulShotsNowandthenIcanstillseetheirface
ExperiencedobserversonAmericancampuseshavebeguntonoticeanewgroup
可燃物与氧化剂作用发生的放热反应,通常伴有()现象,称为燃烧。A.火焰、
克罗恩病与肠结核最重要的鉴别在于A.有无发热、腹痛;腹泻乏力 B.OT试验是否
下列关于中学“腐乳的制作”实验,叙述正确的是()。A.加盐主要是为了调节水分.利
有溃疡病者应慎用A.利血平 B.普萘洛尔 C.氢氯噻嗪 D.氯丙嗪 E.
212)发信机主要由调制电路、振荡电路、放大电路、高频滤波电路等构成。()
帮助建设单位优化设计或从使用维护等角度上对设计方案进行调整,使项目在总体上更能满
下列属于学校教育制度内容的是( )A.修业年限 B.教学大纲 C.课程
土壤中某污染物的自然本底值是0.5mg/kg,其卫生标准为1.5mg/kg,那么
最新回复
(
0
)