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
37
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://kaotiyun.com/show/DrB7777K
0
大学英语六级
相关试题推荐
Itmakespeoplefeelmoreanxious______(当他们把噩梦和压力联系在一起).
A、TheUnitedStates.B、Italy.C、France.D、Ireland.A细节辨认题。短文最后列举出美国、英国和前苏联曾发生过代价昂贵的核事故。
Here’smoreproofthatmostpeoplehavehabitsthataren’tveryhealthful—andsometimescanbeplaindisgusting.Forastud
Olderpeoplewhoholdtemporaryorpart-timejobsafterretirementenjoybetterphysicalandmentalhealththanthosewhostopw
WeShouldn’tTotallyTurntotheInternet1.现在不少人一遇到问题就上网搜答案2.这种现象可能产生的影响3.你认为应该怎么做
A、Thetramphadstolennothingofvalue.B、Thestorehadprofitedbytheincident.C、ThetramphadahappyChristmas.D、Thestor
Itwasgoingtohaveroughlytheeffectofaneutronbombattackonhighstreetsandshoppingmalls.Thebuildingswouldbeleft
Entertheinformationage.Informationistherawmaterialformanyofthebusinessactivities【C1】______thisnewera,justas
A、Moviemagazines,comicbooksandTVguides.B、Dallynewspapers,moviemagazinesandTVguides.C、Fictionnovels,comicbooksa
随机试题
根据.184708--92《钢制压力容器焊接工艺评定》的规定,当焊接接头有冲击韧度要求时,焊接热输入属于_____。
信息不对称条件下市场参与者之间的契约关系被称为
甲型肝炎的潜伏期为
关于恶性肿瘤的淋巴道转移,下列哪项不正确?
A.肝B.心C.脾D.肺E.肾根据中医藏象学说主水的脏是
建设工程未经竣工验收,发包人擅自使用后,在建设工程的合理使用寿命内对地基基础工程和主体结构质量承担民事责任的主体是()。
城市低保金的申请,是由户主向( )的街道办事处或镇人民政府提出书面申请。
证明不等式3x<tanx+2sinx,x∈(0,π/2)。
以逻辑变量X和Y为输入,当且仅当X和Y同时为0时,输出才为0,其他情况下输出为1,则逻辑表达式为________。
Wheredoyoureallycomefrom?Andhowdidyouget(1)whereyoulivetoday?DNAstudiessuggestthatallhumanstoday(2)from
最新回复
(
0
)