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
Scientists claim that air pollution causes a decline in the world’s average air temperature. In order to prove that theory, ecol
Scientists claim that air pollution causes a decline in the world’s average air temperature. In order to prove that theory, ecol
admin
2010-02-21
39
问题
Scientists claim that air pollution causes a decline in the world’s average air temperature. In order to prove that theory, ecologists have turned to historical data in relation to especially huge volcanic eruptions. They suspect that volcanoes effect weather changes that are similar to air pollution.
One source of information is the effect of the eruption of Tambora, a volcano in Sumbawa, the Dutch East Indies (the former name of the Republic of Indonesia), in April 1815. The largest recorded volcanic emption, Tambora threw 150 million tom of fine ash into the stratosphere. The ash from a volcano spreads worldwide in a few days and remains in the air for years. Its effect is to turn incoming solar radiation into space and thus cool the earth. For example, records of weather in England show that between April and November 1815, the average temperature had fallen 4.5°F. During the next twenty-four months, England suffered one of the coldest periods of its history. Farmers’ records from April 1815 to December 1818 indicate frost throughout the spring and summer and sharp decreases in crop and livestock markets. Since there was a time lag of several years between cause and effect, by the time the world agricultural commodity community had deteriorated, no one realized the cause.
Ecologists today warn that we face a twofold menace. The ever-present possibility of volcanic eruptions, such as that of Mt. St. Helens in Washington, added to man’s pollution of the atmosphere with oil, gas, coal, and other polluting substances, may bring ms increasingly colder weather.
No one realized the cause of the deterioration of the world agricultural commodity market because ______.
选项
A、there was a long interval between cause and effect
B、the weather was difficult for us to forecast
C、weather forecasts were inaccurate
D、ecologists didn’t exist until modem times
答案
A
解析
根据第二段最后一句话,由于结果较原因有一段时间的时间间隔,所以直到农产品市场收到严重影响,人们才知道其起因。
转载请注明原文地址:https://kaotiyun.com/show/BgIO777K
0
考博英语
相关试题推荐
HowtoapproachListeningTestPartTwo•ThispartoftheListeningTesttestsyourunderstandingofnumbers,namesandspelling
Mr.Lineedstogetchangedandfreshenupafterhisshift.Mr.Zhangwantstoresearchhowthegoodsarecurrentlymanufacture
•ReadthefollowingreviewofabookcalledNeverQuit!TheUpsandDownsofRunningaFamilyBusiness.•Foreachquestion
Questions11-15•Lookatthechartsbelow.Theyshowcompanyprofits.•Whichchartdoeseachsentence(11-15)describe?•Foreac
A、Torepairthemachine,followtheinstructionsinthebook.B、Consultthebookfordetailsbeforeusingthismachine.C、Ifthe
Questions29-40•Readtheintroductionbelowaboutacompanytrainingprogramme.•Choosethecorrectwordtofilleachg
Boardingtimes:30minutesbeforedeparturetimefordomesticandIhourforinternationalflights.
TourisminThailandIn1997therewereover7million(29)toThailand.Therewere(30)independenttravelers(up4.5%
Writeacompositionofnofewerthan200wordsonONEofthethreetopicsbelowwithinhalfanhour.Pleasewritethecompositio
TheBasisforSocialOrderMan,saidAristotle,isasocialanimal.Thissociabilityrequirespeacefulcongregation,andthe
随机试题
Onceuponatimeapoorfarmertakingasackofwheattothemill.Hedidnotknow【56】todowhenitslippedfromhishorseandf
有DNA连接酶参与的反应包含
下面是一份土地估价技术报告的总述部分(标注“略”的为正常内容)。请阅读后回答相关问题。一、估价项目名称××上市公司股权转让所涉及的土地使用权价格评估。二、委托估价方(略)三、受托估价方(略)四、估价目的本次土地估价是为××上市公司因股权转让核定
某建设项目建安工程费6500万元,设备购置费3200万元,工程建设其他费用1000万元,已知基本预备费率8%,项目建设前期年限为1年,建设期为2年,各年投资计划额为:第一年完成投资60%,第二年完成40%。年均投资价格上涨率为8%,则建设项目建设期间涨价预
关于政府对基金的监管与基金行业自律监管,以下表述错误的是()。[2016年12月真题]
以下对采购与付款业务流程中付款环节的控制活动以及与相关认定的对应关系的陈述中,不恰当的是()。
绢花
朝鲜战争延缓了我国解放台湾的步伐。()
你和另外一个科室的科长有过节,关系很不好。后来,这个科长被调到你们科室成了你的领导,他对你很冷淡,你怎么办?
设0≤an<(-1)nan2中,哪个级数一定收敛?
最新回复
(
0
)