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
2013-06-02
52
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 a11 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,property 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.
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
What is the passage mainly about?
转载请注明原文地址:https://kaotiyun.com/show/V767777K
0
大学英语六级
相关试题推荐
Theproblemofpopulationismainlyman-made.Theenormousincreaseinpopulationisreallyduetothespreadoftheknowledge
Atlastsheleftherhouseandgottotheairport,______(不料却看到飞机正起飞).
Biologically,thereisonlyonequalitywhichdistinguishesusfromanimals:theabilitytolaugh.Inauniversewhichappearst
A、Asickfriend.B、Amathclass.C、Schoolpolicy.D、Theman’stest.C一定要把握关键词,几个选项都有迷惑性,但是A,B和D只是在文中出现,只有C是正确答案,依据"privacyact"
A、Theirinterestinphysicalactivities.B、Theirinterestindangerousexperiences.C、Theirinterestinnatureandoutdooractiv
A、Averagetuitioncostsincreasedby9percent.B、Averagetuitioncostsincreasedby15percent.C、Averagetuitioncostsincreas
Americansthisyearwillswallow15,000tonsofaspirin(阿司匹林),oneofsafestandmosteffectivedrugsinventedbyman.Themost
Manlivesincommunities.Hissocialexistencerestrictshis【B1】______incertaindirectionsandextendsitinothers.Society【B
Manlivesincommunities.Hissocialexistencerestrictshis【B1】______incertaindirectionsandextendsitinothers.Society【B
随机试题
自然派
可用阴阳互根互用关系说明的有
下列哪种疾病触诊语颤消失
乙型脑炎病毒下列哪项描述不正确
按照《建设项目环境保护管理条例》的规定,建设单位应当在( )报批环评文件。
某商品原报单价为:CIFC2%NewYorkUSD3000/MT,外商要求将佣金率提高至5%,在保持我方净收入不变的情况下,应如何报价?(保留两位小数)
我国政府明令禁止进口的货物包括:列入由国务院对外贸易主管部门或由其会同国务院有关部门制定的《禁止进口货物目录》的商品和国家有关法律、法规明令禁止进口的商品以及其他各种原因停止进口的商品。请指出以下哪些属于国家禁止进口的货物:
公民、法人和其他组织对()不服,不能申请劳动保障行政复议。
体内有性质明确、部位具体的异常知觉,属于()。
Justlikechildren,deeroftencrossBritishroadstogettotheotherside.Butthecostisthedeer’slife.Atnight,【S1】____
最新回复
(
0
)