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、It is extremely dangerous to fly in the dark. B、Noise regulations restrict the hours of airport operation. C、Some of its runwa
A、It is extremely dangerous to fly in the dark. B、Noise regulations restrict the hours of airport operation. C、Some of its runwa
admin
2013-10-28
39
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, 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.
29. Why is there no jet traffic at Washington’s National Airport from 11 pm to 7 am?
30. What result might noise reduction cause according to the speaker?
31. What is the passage mainly about?
选项
A、It is extremely dangerous to fly in the dark.
B、Noise regulations restrict the hours of airport operation.
C、Some of its runways are not in good condition.
D、Cargo planes produce more disturbing noises at night.
答案
B
解析
细节题。短文开头提到,由于噪音控制条例限制飞机运作时间,现今机场在以较低的容纳量运作,比如,华盛顿国家机场就规定从晚上儿点到次日凌晨7点禁止飞机起降。由此可知,B为正确答案。
转载请注明原文地址:https://kaotiyun.com/show/xl27777K
0
大学英语六级
相关试题推荐
Mostpeopledon’twakeupinthemorning,combtheirhair,andwalkoutthefrontdoorandontotheworldstage.ButBritain’sP
Mostpeopledon’twakeupinthemorning,combtheirhair,andwalkoutthefrontdoorandontotheworldstage.ButBritain’sP
A、It’sopenonlytoteachersandpostgraduates.B、Hecanstudythereifheiswritingaresearchpaper.C、Seniorstudentscanen
A、Theyaregratefulstudents.B、Theyare"brains".C、Theyarehard-workingstudents.D、Theyarefunpeople.A女士说组织者都是些感恩的学生,并不是“
A、Itispartoftheirlocalheritage.B、Itisanattractionoftourists.C、Itistherevivalofmorals.D、ItisthemiracleofG
A、Hecamealongwaytomeetthewoman.B、Heshowedhertowhereshewaslookingfor.C、Hetookhertovisitaninterestingcomm
A、Herushedintoashopthelastminutebeforeitwaslocked.B、Hewaslockedinastorewhilethestaffhurriedhome.C、Herece
A、Shewantsthemantobuyacalculator.B、Shewantstobuyanothercalculator.C、She’llgiveherstothemanifhebuysherac
Thatexperiencesinfluencesubsequentbehaviourisevidenceofanobviousbutneverthelessremarkableactivitycalledrememberin
随机试题
问卷调查是社会工作的研究方法之一。它依据问卷收集资料,并可将问卷的问题分为态度、行为和状态三种类型,以下属于行为类型的提问是()。
秦观词作的题材多为【】
Manylargecitiesare【C1】______butbeautiful.Streetsarelittered【C2】______garbage.Inthegarbage,however,thereisstillsom
A.呼吸性细支气管呈囊状扩张B.肺泡管、肺泡囊和肺泡扩张C.两者皆有D.两者皆无腺泡中央型肺气肿
按照四象限模型,确定房地产资产需求的关键是房地产使用市场的()。
依照《环境影响评价法》的规定,北京市城市建设规划应当在()的时候,组织进行环境影响评价。
某新建机械厂工程施工项目采取公开招标,某机电安装公司,通过招投标承包该项目,与业主签订了施工总承包合同,某机电安装公司除土建工程分包给具有相应资质的建筑施工单位施工外,其余的设备、管道、电气仪表等机电安装工程均由该公司下属的专业公司负责施工。工程
CouranCoveIslandResortisalargeintegratedecotourism-basedresortlocatedsouthofBrisbaneontheGoldCoast,Queensland,
操作系统中,文件系统的主要目的是( )。
Youmusthavebeentroubledbywhentosay"Iloveyou"becauseitisoneofthegreatestpuzzlesinourlife.Whatifyous
最新回复
(
0
)