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、The effects of noise on the quality of life. B、The role of air traffic restrictions. C、The production of quieter engines. D、Th
A、The effects of noise on the quality of life. B、The role of air traffic restrictions. C、The production of quieter engines. D、Th
admin
2016-04-03
53
问题
The economic costs of noise to society are several. Airports are currently operating at less capacity because of noise regulations which restrict their hours of operation. For instance, at Washington’s National Airport jet traffic is not allowed from 11 pm to 7 am. Other airports restrict the use of certain runways. One estimate is that noise restrictions reduce possible airport use by 20 percent. The profitable cargo trade is especially affected by night restrictions.
In the case of airports, jet engines may be modified to reduce their noise level. One estimate is that $5.7 billion would be required to equip all existing jet engines with noise control devices. However, even taking this step will not reduce noise levels at all points to acceptable values. Some combination of methods is probably necessary.
If all aircraft were made quieter by existing methods, there would be a number of economic benefits. An increase in airport capacity would occur. Property values near airports might rise. Transportation costs to and from airports could be reduced since the airports now could be located closer to population centers.
Much research still needs to be done on the economic aspects of noise reduction and noise effects. Although some of the effects of noise pollution are known, more must be discovered about its effects on health, productivity, properly values and the quality of life. Furthermore, the cost of noise pollution to the economy as a whole needs to be investigated. The public must be alerted to the dangers and economic costs of noise pollution so that people may make intelligent choices and exert appropriate pressures.
19. Why is there no jet traffic at Washington’s National Airport from 11 pm to 7 am?
20. What result might noise reduction cause according to the speaker?
21. What is the passage mainly about?
选项
A、The effects of noise on the quality of life.
B、The role of air traffic restrictions.
C、The production of quieter engines.
D、The economic aspects of noise reduction.
答案
D
解析
主旨题。本文并无主题句,需要通过上下文综合理解。短文首先提出了噪音所带来的economic costs这个问题,然后又讨论了noise reduction所带来的economic benefits。通过对文章的整体把握,可以推断出D为正确答案。A、B、C在文中都有提及,均为细节内容而非文章主题。
转载请注明原文地址:https://kaotiyun.com/show/CnG7777K
0
大学英语六级
相关试题推荐
Whatoursocietysuffersfrommosttodayistheabsenceofconsensusaboutwhatitandlifeinitoughttobe.Suchconsensusca
A、Lethimwinatennisgame.B、Helphimfinishhisanthropologyproject.C、Givehimsomemedicineforhisstomach.D、Lendhimhe
Ifyouareattendingalocalcollege,especiallyonewithoutresidencehalls,you’llprobablyliveathomeandcommutetoclasse
A、10:10.B、9:50.C、9:40.D、9:10.B女士对男士说不知道火车是怎么了,现在已经9:30了,火车应该20分钟前就到站了,也就是说火车应当于9:10到站,男士让女士别急,广播已经通知了,火车将会晚点四十分钟。计算下来,火车的实际到
Thefinancialcrisisthatstartedin2007uptonowisaglobalfinancialcrisistriggeredbyaliquidityshortfallintheUnite
A、Tocleanupyourbedroom.B、TowatchTV.C、Todrumyourringers.D、Tostretchyourback.B细节题。对话中强调减肥并不一定要做那些大的动作,仅仅做些消耗体能的动作就
Learningisanessentialprocessforlivingthingstoacquirenecessaryskillsandbehaviors.Scientistshavealreadyfoundthat
A、Ataparty.B、Atschool.C、Atafriend’shouse.D、Intheclassroom.B细节题。男士问女士他们是否曾见过面,女士说是的,他们上周在校园见过。可见他们第一次见面是在学校。
A、Theyworkonthesamefloorsinthesameshoppingcenter.B、Theyhaven’tmetbefore.C、Theyarebothbusinessmajors.D、Theya
随机试题
分度头蜗杆脱落手柄的作用是__________。
多食易饥,大便溏泄是
一中学生,15岁,暑假帮家里夏收劳动时出现头痛、胸闷、四肢无力、恶心,体检:病人面色苍白,出冷汗,体温37.5℃,脉搏112次/分,血压70/50mmHg。
美国Framingham心血管病研究中,男性队列中发现高胆固醇水平患冠心病OR=2.4(有显著意义),而在病例对照研究中高胆固醇的0R一1.16(无统计学显著意义)。分析发现,原因是患冠心病者诊断后该病人改变了不良的生活习惯。引起两种方法之间的差异的偏倚是
甲犯某项罪行的法定最高刑为5年有期徒刑的,对该罪行的追诉时效期限为:
海关权力的特点有()
证券的发行、交易活动必须遵循()的原则。
建设“智慧山东”是以()为核心资源。
比较积分值的大小:设其中,D1={(x,y)|x2+y2≤R2},D2={(x,y)|x2+),y2≤2R2},D3={(x,y)||x|≤R,|y|≤R},则下述结论正确的是
gotpromotion
最新回复
(
0
)