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
A、Ozone as a form of oxygen. B、Problems caused by the thinning of the ozone layer. C、The origin of ozone problems. D、The latest
A、Ozone as a form of oxygen. B、Problems caused by the thinning of the ozone layer. C、The origin of ozone problems. D、The latest
admin
2013-06-02
40
问题
Ozone is a form of oxygen. It is found in the air we breathe and in the upper atmosphere. Near Earth, ozone ii1 the air is a danger to life because it is a pollutant. (33)But between ten and fifty kilometers up in the atmosphere, ozone protects life on Earth. Ozone forms in the atmosphere through the action of radiation from the sun. Ozone blocks harmful radiation from reaching Earth. Scientists say a decrease in ozone and an increase in the harmful radiation will cause many more cases of skin cancer. And it will harm crops, animals and fish.
(34)Ozone problems first became known in 1985. British scientists reported that ozone levels in the Antarctic atmosphere near the South Pole fell sharply each year in October and November. 1987 was the first year that a huge hole developed in the ozone layer above the Antarctic.
(35)A recent study of the atmosphere over the Arctic area near the North Pole showed extreme thinning of the ozone. Officials from the American space agency said the latest study is a result of the largest campaign yet to measure ozone amounts and changes in the Arctic area. NASA researcher Paul Newman said some of the measurements show ozone in the Arctic decreased about 60% between January and the middle of March. These measurements are similar to the ozone losses observed in this area a few years ago. (35)Other studies have shown that man-made chemicals were destroying ozone in the atmosphere. An international agreement halted production of the most harmful chemicals. (35)The new findings support the idea that recovery of the ozone layer can not be delayed.
选项
A、Ozone as a form of oxygen.
B、Problems caused by the thinning of the ozone layer.
C、The origin of ozone problems.
D、The latest studies of ozone problems.
答案
D
解析
主旨大意题。文章首先简单讲述了臭氧层存在的位置、形成的方式以及它是如何被人类发现的,然后文章的大部分内容都是与人类对臭氧层的研究有关。归纳可知本文的主要内容为D)“对于臭氧层的问题的最新研究”。
转载请注明原文地址:https://jikaoti.com/ti/iVXFFFFM
0
大学英语六级
相关试题推荐
A、Itcanbesituatedeverywhere.B、Fewstaffareneededtorunit.C、Itscostisratherlow.D、Itcanoffermanyjobs.B细节推断题。短文
Here’smoreproofthatmostpeoplehavehabitsthataren’tveryhealthful—andsometimescanbeplaindisgusting.Forastud
Formostpeople,fatisaburden.Itdoesntreallymatterwhereitappears,wejustdon’twantit.Butitturnsoutthatourbo
Forthispart,youareallowed30minutestowriteashortessayentitledPuttingLabelsonStudents.Youshouldwriteatleast
WhathaveBillStoneandhisteamsaccomplished?WhydoesNASAwanttoexploreEuropaaccordingtothepassage?
StayingSmart:AdviceonNavigatingYourCareerMillionsofcareerchangesoccureachyear.Somearenatural,butmanymore
StayingSmart:AdviceonNavigatingYourCareerMillionsofcareerchangesoccureachyear.Somearenatural,butmanymore
A、Afarmer.B、Apoliceman.C、Acountrydoctor.D、Anewspaperreporter.C根据上题分析,说话者很可能是一位乡村医生,故答案为[C]。
Whethertheeyesare"thewindowsofthesoul"isdebatable;thattheyareintenselyimportantin(36)______communicationisa
A、Toputanadinthenewspaper.B、Torenovatetheapartment.C、Torenttheapartment.D、Toselltheapartment.C女士说广告上说租金是每月525
随机试题
下列哪项不是正中神经损伤的临床表现
嵌体修复乳牙I类洞形时,牙体制备的深度应达牙本质A.0.5mmB.0.8mmC.1.0mmD.1.2mmE.1.5mm
导致钩状效应的因素是()。
在知识产权保护方面,我国已经加入了()等国际公约。
通过某些管理活动和个人活动,提升团队的绩效,这样的活动称为()。
简述针对不同气质类型的学生进行因材施教的方法。
赶路的人,为了远方的目标,无意留心沿路的风光。许多其实并不比你追寻的东西逊色的路边风物,被你轻易地忽略过去了,待我们多年后明白过来时,已追悔莫及。而当你把赶路的心态转换成散步的心态,你就会发觉,得到有味,失去也有味;富有有味,清贫也自有味:成功有味,失败也
论文被摘录或引用,虽然有些是论文质的价值表现,但并不全能显示论文的质,有的可能是为了反对论文观点的批判性摘引。还有的引述可能只是思潮性、附和性引用。文摘类刊物所不重视、不摘引或漏摘、漏引的论文并不一定不重要、不优秀。由此可以推出()
—Excuseme,Iwassittingthere.—Ohwereyou?Sorry,Ididn’trealize.—________.—Letmemovemythings.
______(他们最担心的)istheir30yearolddaughterwhoisstillsingle.
最新回复
(
0
)