首页
登录
职称英语
[originaltext] The economic costs of noise to society are several. Airports
[originaltext] The economic costs of noise to society are several. Airports
游客
2023-08-26
66
管理
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:http://tihaiku.com/zcyy/2959144.html
相关试题推荐
[originaltext]Intoday’sclass,wewilltalkaboutsomethreeheroesofour
[originaltext]Therewasalittleboyvisitinghisgrandparentsontheirfar
[originaltext]M:Uh,couldIborrowafewdollarsuntilpayday?Ineedcashbad
[originaltext]M:Uh,couldIborrowafewdollarsuntilpayday?Ineedcashbad
[originaltext]M:Uh,couldIborrowafewdollarsuntilpayday?Ineedcashbad
[originaltext]M:Whereareyougoing,Catherine?TodayisSaturday.W:Saturday
[originaltext]M:Goodmorning.MynameisFox.Ibelieveyouhavearoomreserv
[originaltext]M:Goodmorning.MynameisFox.Ibelieveyouhavearoomreserv
[originaltext]M:Goodmorning.MynameisFox.Ibelieveyouhavearoomreserv
[originaltext]M:Goodmorning.MynameisFox.Ibelieveyouhavearoomreserv
随机试题
[originaltext]M:VictoriaZackheimistheeditorofthebookseriesTheOtherW
[originaltext]M:Jane,youknow,itissuchahugedaytomeWillyougoouteat
8个月婴儿体重6.5kg,身长65cm,头围44cm,能爬,肌张力正常,乳牙未萌
恶寒发热,无汗,头身疼痛,鼻塞流涕,脉浮紧,其舌苔应为A、白厚苔 B、薄白苔
已知某工程双代号网络计划的计划工期等于计算工期,且工作M的开始节点和完成节点均为
白细胞减少症的病因中属粒细胞破坏过多的是A.周期性粒细胞减少症 B.脾功能亢进
下列何种情况怀疑是HIV感染A:CD4T细胞↓,CD8T细胞正常,CD4/CD8
A.CMB.VLDLC.LDLD.HDLE.FC外源性甘油三酯及胆固醇的主要运输
新疆维吾尔自治区某多民族杂居的地区(当地通用语言为汉语)发生了一起故意伤害案件,
(2020年真题)盾构接受施工,工序可分为①洞门凿除、②到达段掘进、③接收基座安
最新回复
(
0
)