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
Collision between an aircraft and one or more birds is termed a bird-strike. Pilots sometimes record a birdstrike while at cruis
Collision between an aircraft and one or more birds is termed a bird-strike. Pilots sometimes record a birdstrike while at cruis
admin
2013-11-20
58
问题
Collision between an aircraft and one or more birds is termed a bird-strike. Pilots sometimes record a birdstrike while at cruising altitudes, but most of them happen when an aircraft is relatively close to the ground, usually in proximity to an airport and during the circling, descent to land or take-off phases of a flight.
Birdstrikes may cause significant damage to an aircraft and/or, if the birds are ingested into a jet engine, a significant and sudden loss of power. If this were to happen during take-off or initial climb of a fully loaded passenger aircraft the results could be catastrophic—loss of the aircraft and the lives of those on board. Any bird is a potential hazard to aircraft and this is especially true as bird numbers and bird size increase.
Unfortunately airports themselves can be attractive to birds—rodents, insects and other small animals are a food source often found in flat grassed areas such as the runway strips. Even so, this problem can be reduced by careful habitat management or bird harassment techniques practised by airport maintenance and safety personnel.
Further problems may arise because the airport is located on bird migration routes. These may have existed prior to the airport site selection—but may not have been taken into account because the problem was not understood at the time—or have only been recently established because the birds have found an attractive new food source. Care needs to be taken by local authorities in deciding the location of rubbish tips, or when permitting other land uses that may be attractive to birds in this way. Of course these effects cannot always be anticipated with certainty since birds such as gulls have been recorded as travelling 50 kilometres or more from their roosting area to an attractive food source.
Agricultural uses may be thought desirable because they are compatible with high levels of noise exposure, but they can have an adverse effect on air-craft operations if birds are attracted during seeding or crop cultivation. Birds may also be attracted to pig farms where garbage is used as fodder. Even tree plantings can present a hazard if the species provides an attractive food source or nesting habitat.
Local authority planning schemes often apply strict controls on developments such as abattoirs, cattle feed lots, grain handling, piggeries, canals and marina developments, fish farms, and suchlike. In most cases these uses will not be permitted without a full environmental study. That study should be required to deal with the question of likely bird hazards if the proposed location is in proximity to an airport.
In some instances it may be necessary to consider ways of managing a particular land use in order to reduce its attractiveness to birds, for example the adoption of land-fill measures at garbage tips, or enclosed rather than open-air activity. Specialist ornithological opinion may be necessary. In such cases it may not be possible to implement immediate changes in land use, but this should not inhibit the adoption of long-term measures which are designed to achieve this.
SUMMARY;
A collision between an aircraft and one or more birds is known as a bird strike. It usually happens when an aircraft is close【R1】______, and may result in significant damage of the aircraft or loss of the aircraft and【R2】______of passengers and crew if they occur during take-off or initial climb. Because birds can find plenty food in flat grassed areas, airports are especially attractive to birds. However, the danger can be minimized by【R3】______. Local authorities need to take care when deciding on【R4】______. It is suggested that a full environmental study should be made before making plans of developments on the land in proximity to an airport. Local authorities should get advice from specialists and take【R5】______in order to bring about changes in land use.
【R1】
选项
答案
to the ground
解析
(文章第一段第二句提到but most of them happen when all aircraft is relatively close to theground。“所有这些飞行事故的发生都是在飞机接近地面的时候。”)
转载请注明原文地址:https://kaotiyun.com/show/3cAK777K
本试题收录于:
B类竞赛(英语专业本科专科)题库大学生英语竞赛(NECCS)分类
0
B类竞赛(英语专业本科专科)
大学生英语竞赛(NECCS)
相关试题推荐
Whatlettershouldreplacethequestionmark?
GoingtothebeachismanyAmerican’sfavoriteactivity.IntheareanearNewYorkCity,ninemillionpeopleusedtogototheb
Everyartistknowsinhisheartthatheissayingsomethingtothepublic.Notonlydoeshewanttosayitwell,buthewantsit
AdvancenoticeisoftenreferredtoinAmericaas"leadtime,"anexpressionwhichissignificantinaculturewhereschedulesa
Youseethefollowingadvertisementinaninternationalmagazine.Writealetterofapplicationin120words.Donotincludeany
Sportsisoneoftheworld’slargestindustries,andmostathletesareprofessionalswhoarepaidfortheirefforts.Becausean
MyfriendsandIenjoydoingmanyofthesamethings.Inthatrespect,wehavealot______.
Theideaofafishbeingabletogenerateelectricitystrongenoughtolightlampbulbs—oreventorunasmallelectricmotor—is
Iwentaroundsniffingattheotherdoors,tryingtofindoutwherethesmellwascomingfrom.Ifinallydiscovereditwas______
A、10B、15C、20D、30B这道题是典型的数字类题型,考查数字的分析与计算。对话录音内容非常贴近生活,询问求职广告的花费。录音中没有直接给出答案,需要参赛者在听的同时将对话中出现的所有数字和其对应的对象用笔记录下来,然后进行简单的计算。从
随机试题
激素的灭活主要在哪个器官进行
健康男婴,出生体重为3.5kg,身长为50cm,头围34cm,现在年龄为6个月,来医院做健康体检。在感知觉发育上,预计该婴儿可以
下列有关釉质表面处理的描述,不正确的是
以下哪点不是病人的义务
以下关于信息概念最接近的描述是
下列各项中,哪项对于肾病综合征的诊断无意义
A.左室充盈障碍B.左室后负荷突然增加C.左室舒张期过短D.左室排血量急剧下降E.左室前负荷突然增加
由于业主原因,工程暂停一个月,则承包商可索赔( )。
食物链一词是英国动物学家埃尔顿于1927年首次提出的。如果一种有毒物质被食物链的低级部分吸收,如被草吸收,虽然浓度很低,不影响草的生长,但兔子吃草后有毒物质很难排泄,会在它体内积累;鹰吃大量的兔子,有毒物质会在鹰体内进一步积累。美国国鸟白头鹰之所以面临灭绝
MergersandAcquisitionsMergersandAcquisitionsreferstotheaspectofcorporatestrategy,corporatefinanceandmanageme
最新回复
(
0
)