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’s generally agreed that the greatest threat facing the world today is the warming of the earth’s atmosphere, commonly called
It’s generally agreed that the greatest threat facing the world today is the warming of the earth’s atmosphere, commonly called
admin
2010-01-11
51
问题
It’s generally agreed that the greatest threat facing the world today is the warming of the earth’s atmosphere, commonly called global warming or the greenhouse effect. But what is the cause of the greenhouse effect?
We have been producing too many of the gases which, when they are released into the earth’s atmosphere, trap heat, and thus raise their temperatures. There are several gases involved, but the main ones are carbon dioxide ( 二氧化碳 ) and chlorofluorocarbons ( 氯氟甲烷 )--often called CFCs. The carbon dioxide comes from burning forests and from burning fossil fuels such as oil and coal. The CFCs are given off by refrigerators and air-conditioning systems. Carbon dioxide is to blame for 56% of the greenhouse effect, and CFCs for 23%.
The global warming we are experiencing now is only a result of the carbon dioxide and other gases we have dumped into the atmosphere up to the 1960s. In other words, the damage may have already been done. Temperatures are expected to increase by at least 1.3 Celsius degrees by 2030 and 3 degrees by the year 2070.
选项
A、Cause and Effect of Global Warming
B、Damages Done by Global Warming
C、Global Warming and Industrial Development
D、Solution to the Problem of Pollution
答案
A
解析
本题询问本文的最佳标题是什么。本文第一段就提出论点,根据原文(36)处可知,即找出全球变暖的原因及其后果,故选A。
转载请注明原文地址:https://kaotiyun.com/show/S5qK777K
本试题收录于:
大学英语三级A级题库大学英语三级分类
0
大学英语三级A级
大学英语三级
相关试题推荐
A、Sandwichandcoffee.B、Beer,please.C、It’smyfavoritefood.D、Idon’tlikethismeal.A问题问的是迈克,你中午经常吃什么?A项“三明治和咖啡”是对所吃东西的
A—UnitedNationsEnvironmentProgramB—WorldHealthOrganizationC—WorldMeteorologicalOrganization
Oldagehasalwaysbeenthoughtofastheworstagetobe;butitisnot【B1】____fortheoldtobeunhappy.Witholdageshould
A、It’sFriday.B、Itmatchesmewell.C、Iboughtitinthedepartmentstore.D、Sorry,Idon’tknow.D本题问的是“你知道这个多少钱吗?”A、B、C3项都答非
Travelwasnotalwaysaspopularasitistoday.Inthepastonly【B1】________peoplecouldtraveltoothercountries.Butin【B2】_
A、Idon’tfeellikeeatinganything.B、Forgetit.C、Icameheretwodaysago.D、Thankyouforsayingthat.A问题问的是你怎么了。what’sthe
Doyoualwaysunderstandthedirectionsonabottleofmedicine?Doyouknowwhatismeantby"Takeonlyasdirected"?Readthe
DearMr.Dias,Furthertoyourletterof22November,Iamveryhappytosaythatwearenowinapositiontoconfirmourpa
A、Inarestaurant.B、Inashop.C、Inasupermarket.D、Inalibrary.A男士问女士点菜了吗,女士回答说她正在看菜单并且问男士是否饿了。很显然这个对话发生在餐馆里。在听录音时应注意抓住关键词,
Businessmemoisfrequentlyusedincompanies.Itiscalledanintra-companycommunicationbecauseitisusedbypeopleintheir
随机试题
肌腱袖
符合溶血性黄疸的是()
37岁孕34周,出现食欲减退、恶心、呕吐、腹胀、低热等不适,同时出现尿色深黄,查体发现巩膜黄染、血ALT140U/L,总胆红素2mg/dl,血压140/90mmHg,胎头浅定,胎心140次/分。以下哪项处理不适当
痞满的基本病机是
治疗肝郁气滞型聚证的主方为
有关房地产的抵押,下列哪些表述是正确的?()
框架梁跨中处纵向受拉钢筋的最小配筋率为( )项数值。边支座梁端截面的受拉钢筋配筋与( )项配置最为接近(按单筋梁计算)。
工程竣工文件,包括竣工报告、竣工验收证明书和( )组织竣工验收的文件。
警务公开,是指依法公开警务活动的()。
下列叙述中正确的是()。
最新回复
(
0
)