首页
登录
职称英语
It’s generally agreed that the greatest threat facing the world today is the
It’s generally agreed that the greatest threat facing the world today is the
游客
2024-07-05
54
管理
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://tihaiku.com/zcyy/3664477.html
相关试题推荐
Itisgenerallyacceptedthatoldpeopleshouldhaveashareintherewardsfor
Thegreatestbenefitofsciencehasbeen______.[br]Thesubjectofthispassag
Thegreatestbenefitofsciencehasbeen______.[br]Theword"caprice"herere
Thegreatestbenefitofsciencehasbeen______.[br]Theword"caprice"(line7
Thegreatestbenefitofsciencehasbeen______.[br]Itisimpliedinthepass
Osaka(大阪)wasJapan’sgreatestcommercialcityinancienttimesandisthecity
Themanager,aswellashisadvisers,______toattendthemeeting.A、areagreed
Therapidlyexpandingnumberofautomobilesthreatensafurtherescalationinth
Itplayedwith__________.astrongbeat将句子“Rockisgenerallyaloudkindofmusic
Whatisthemainideaaboutthepassage?[br]Generallyspeakinghowmanystages
随机试题
In1966,TheyRefusedtoSue?NotNowWheneverthephrase"c
Astheholidaysapproach,manypeoplearefinishingtheirtravelplans.And
Ifyouuseacomputeratwork,youprobablyalreadyknowthatalongdayof
场面调度派是西方电影理论与创作实践中对立的两大派之一,其对立面为( )。A.欧
北宋在统一南方割据势力过程中,特设()把征南所得的财富统一存放,以作以后恢复幽
土的含水量越高,粘聚力也就越大。
男孩,3岁,自幼人工喂养,食欲极差,常有腹泻及呼吸道感染,身高85cm,体重7.
详细交代服药方法、注意事项的调剂过程是A.收方B.核对处方C.配方D.发药E.审
药师调剂处方时必须做到"四查十对",不正确的是A.查处方,对科别、姓名、年龄B.
关于室内防水立管外设置套管的说法,正确的是( )。A.高出铺装层地面10—30
最新回复
(
0
)