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
22
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
Theaudiencewaitedin______silencewhiletheiragedspeakersearchedamonghis
TheCityofWinchester温切斯特市
出版社在编辑出版大型工具书时,通常要增加( )等制度。A.专项检查制度 B.
危险源识别的方法包括()。A.现场调查方法 B.安全检查表 C.危险与
患者男,45岁。反复胸闷、心悸、端坐呼吸、胸腔积液6个月。查体:呼吸短促,两肺广
肾脏调节酸碱平衡的机制中哪一项是错误的A.Na-H交换 B.K-H交换 C.
关于散剂的质量要求不正确的是A:散剂一般应为细粉B:儿科及外用散应为最细粉C
经产妇,34岁。妊娠40周,宫口近开全,自然破水后,突然咳嗽,随即出现发绀,寒战
对发生风险的银行业金融机构进行处置的方式不包括()。A.接管 B.暂停营业
下列不属于幼儿急疹特点的是 A.病原为柯萨奇病毒 B.潜伏期7?14天,平
最新回复
(
0
)