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
自考
The economic costs of noise to society are several. Airports are currently operating at less than capacity because of noise regu
The economic costs of noise to society are several. Airports are currently operating at less than capacity because of noise regu
admin
2017-06-30
16
问题
The economic costs of noise to society are several. Airports are currently operating at less than capacity because of noise regulations which restrict their hours of operation. For instance, at Washington’s National Airport no jet traffic is 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, or insulation(隔音)from air traffic noise may be provided by the purchase of land around airports or the insulation of buildings. One estimate is that $ 5. 7 billion would be required to equip all existing jet engines with noise control devices. However, considering the current state of the art, 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.
There is no jet traffic at Washington’s National Airport from 11 pm to 7 am because______.
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 disturbing noises
答案
B
解析
转载请注明原文地址:https://kaotiyun.com/show/n2PR777K
本试题收录于:
电子商务英语题库经管类分类
0
电子商务英语
经管类
相关试题推荐
【】是指为了实现企业目标,创造、建立和保持与目标市场之间的互利交换关系,而对设计方案进行的分析、计划、执行与控制。
下列关于市场定位的说法,错误的是【】
()的目的是通过排除观察结果中带有矛盾性的因素来获取实验对象之间的真实因果关系。
如果企业将购入固定资产的3000元,错误地记入了“管理费用”账户,其结果会导致()
TheGreatFireofLondonstartedintheveryearlyhoursof2September1666.Infourdaysitdestroyedmorethanthree-quarters
事实证明,父母的言行对孩子有很深的影响。(effect)
Communicationcanbethemostcriticalaspectofwhetherachangestrategywillsucceedorfail.【T1】Thedegreetowhichinformat
I’dsooneryou______thatnow,thanafterwards.
Ineducation,thereshouldbeagoodbalanceamongthebranchesofknowledgethatcontribute______effectivethinkingandwisej
______theirdifferences,theyfellpassionatelyinlovewitheachother.
随机试题
汗证的主要治法是()(2003年第142题)
Thelocaleducationauthoritycompiledalistof"potentialsecurityproblems"oncampuslastweek.Theyincludefireaccidents,
分析《叶甫盖尼·奥涅金》中“多余人”叶甫盖尼·奥涅金的形象。
要探索符合本国国情的社会主义发展道路,就要
A.点状坏死B.桥接坏死C.碎片状坏死伴桥接坏死D.亚大片坏死E.大片坏死
某村民家中的一条耕牛突然死亡,死因不明,对这样的病畜肉和内脏如何处理是正确的
某投资者以7385限价买进日元期货,则下列()价位不可以成交。
下列有关管理人的表述中,正确的有()。
WhattypeofWebsiteisbeingadvertised?
Nooneknowshowmanlearnedtomakewords.Perhapshebeganbymakingsoundslikethosemadebyanimals.Perhapshegruntedlik
最新回复
(
0
)