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
2021-07-14
40
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.
9. Why is there no jet traffic at Washington’s National Airport from 11 pm to 7 am?
10. What result might noise reduction cause according to the speaker?
11. 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
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11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/LMJ7777K
0
大学英语六级
相关试题推荐
当下人们倡导更健康的生活方式,自行车已再度回归人们的生活,重新成为人们重要的出行工具。
Forthispart,youareallowed30minutestowriteashortessaytoexplainWhyarePeoplenotWittingtoHelp.Youressayshoul
Forthispart,youareallowed30minutestowriteanessayonpreparationbyreferringtothesaying"Byfailingtoprepare,yo
A、Itwasdoomedforthestart.B、Itturnedouttobeadisaster.C、Itwasspoiledbyonegirl.D、Allthestudentsenjoyedit.B
A、Itsavestime.B、Itincreasesparkingcapacity.C、Itensuresdrivers’safety.D、Itreducescardamage.B
A、AttheendofMarch.B、InthemiddleofApril.C、AtthebeginningofMay.D、AttheendofMay.A对话中男士说,他们提供了三个时间选择(分别是A、B、C),来
A、Theambitiontobecomethegreatestmagician.B、Therealitythathefailedinaswimmingrace.C、ThemagicianHoudiniandhis
A、Finishatextbookassignment.B、Reviewforthefinalexamination.C、Chooseproperresearchtopics.D、Prepareanoutlinefora
A、Reluctant.B、Positive.C、Ambitious.D、Indifferent.A①四个选项都是观点态度的词,推测此题问某人态度。②当女士要求男士做清洁时,男生说:“我讨厌打扫!”。可见男士的态度是不情愿的,选A。
A、It’sbeingoutdoors.B、Sheneedstodealwithdifferentpeople.C、It’ssometimesdangeroustodriveatnight.D、Shehastowor
随机试题
叔本华说:“人虽然能够做他所想做的,但不能要他所想要的。”爱因斯坦从中得到的主要启发是()
检验批划分的主要依据是()。
低温容器是指设计温度等于或低于()℃的容器。
采用设备经营租赁的方案,年销售收入1000万元,年经营成本600万元,年租赁费用70万元,与销售相关的税金30万元(每年),所得税率33%,则设备租赁的年净现金流量为()万元。
下列有关消费税的叙述中不正确的是()。
能稳定公司控制权的长期筹资方式包括()。
()缺乏可引起坏血病。
根据2018年国务院政府工作报告,下列有关我国在2018年经济社会发展的主要预期目标说法不正确的是()。
根据以下资料,回答116-120题。2007年我国参加最低生活保障人数是2001的()。
已知某信道的信号传输速率为64kb/s,一个载波信号码元有4个有效离散值,则该信道的波特率为()kBaud。
最新回复
(
0
)