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
2023-09-26
16
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/3048215.html
相关试题推荐
Oncethereisathreattoourwatersupplywatercanquicklybecometheonlytha
[originaltext]Whenyouarequitesick;yourdoctorgenerallyadvisesyouto
WhoisBeethoven?Heisoneofthegreatest______intheworld.[br]Whendid
WhoisBeethoven?Heisoneofthegreatest______intheworld.[br]Whomdid
WhoisBeethoven?Heisoneofthegreatest______intheworld.[br]Whatdid
WhoisBeethoven?Heisoneofthegreatest______intheworld.[originaltext
Generallyspeaking,Chinaisnowonlyatthebeginningstagesofproducingitso
Moremiddle-agedpersonssufferfromhearttroublethanisgenerallyrealized.A、
Itisgenerallyacceptedthatoldpeopleshouldhaveashareintherewardsfor
Thegreatestbenefitofsciencehasbeen______.[br]Accordingtothepassaget
随机试题
[originaltext]W:Iintendtobuysomefruitforthechildren,Theseapplesandba
项目集指导委员会的主要责任是保证项目集能够按照计划实现组织的战略目标,围绕这一基
首次公开发行股票,下列关于网下和网上投资者的说法正确的有( )。 Ⅰ网上投资
你跟家长说我见过对孩子严厉的从来没见过你这么严厉,作为班班主任你怎么看?
肺炎患者出现感染中毒性休克,此时首要处理是A.补充血容量 B.用糖皮质激素
品牌∶注册∶商标A.投资∶评估∶风险 B.成绩∶分数∶排名 C.小说∶映射∶
《中华人民共和国海商法》规定,共同海损理算适用规定不包括()。A.约克—安
某项目计划工作预算投资为50万元,已完工作实际投资为65万元,已完工作预算投资6
某施工企业的第一业务部3月份发生的间接费总额为30万元,该部门当月在建的两个施工
男,20岁,体重60千克,每天需能量3000千卡,在完全不摄入蛋白质食物时,每天
最新回复
(
0
)