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
职业资格
You never see him, but they’re with you every time you fly. They record where you are going, how fast you’re traveling and wheth
You never see him, but they’re with you every time you fly. They record where you are going, how fast you’re traveling and wheth
admin
2016-08-31
19
问题
You never see him, but they’re with you every time you fly. They record where you are going, how fast you’re traveling and whether everything on your airplane is functioning normally. Their ability to withstand almost any disaster makes them seem like something out of a comic book. They’re known as the black box.
When planes fall from the sky, as a Yemeni airliner did on its way to Comoros Islands in the India ocean June 30, 2009, the black box is the best bet for identifying what went wrong. So when a French submarine detected the device’s homing signal five days later, the discovery marked a huge step toward determining the cause of a tragedy in which 152 passengers were killed.
In 1958, Australian scientist David Warren developed a flight-memory recorder that would track basic information like altitude and direction. That was the first mode for a black box, which became a requirement on all U. S. commercial flights by 1960. Early models often failed to withstand crashes, however, so in 1965 the device was completely redesigned and moved to the rear of the plane——the area least subject to impact——from its original position in the landing wells. The same year, the Federal Aviation Authority required that the boxes, which were never actually black, be painted orange or yellow to aid visibility.
Modern airplanes have two black boxes: a voice recorder, which tracks pilots’ conversations, and a flight-data recorder, which monitors fuel levels, engine noises and other operating functions that help investigators reconstruct the aircraft’s final moments. Placed in an insulated case and surrounded by a quarter-inch-thick panels of stainless steel, the boxes can withstand massive force and temperatures up to 2,000 °F. When submerged, they’re also able to emit signals from depths of 20,000 ft. Experts believe the boxes from Air France Flight 447, which crashed near Brazil on June 1,2009, are in water nearly that deep, but statistics say they’re still likely to turn up. In the approximately 20 deep-sea crashes over the past 30 years, only one plane’s black boxes were never recovered.
What information could be found from the black box on the Yemeni airliner?
选项
A、Data for analyzing the cause of the crash.
B、The total number of passengers on board.
C、The scene of the crash and extent of the damage.
D、Homing signals sent by the pilot before the crash.
答案
A
解析
根据文中信息“When planes fall from the sky,as a Yemeni airliner did on its way to Comoros Islands in the India ocean June 30,2009,the black box is the best bet for identif-ying what went wrong.”可知,从黑匣子中可以分析出事故的原因。选择A项。
转载请注明原文地址:https://kaotiyun.com/show/No3v777K
本试题收录于:
英语学科知识与教学能力题库教师资格分类
0
英语学科知识与教学能力
教师资格
相关试题推荐
根据下列材料设计教学片段。(1)《普通高中历史课程标准(实验)》:列举荷兰、英国野蛮抢夺殖民地和建立海外商品市场的史实,认识殖民扩张与掠夺是资本主义列强建立世界市场的主要途径。(2)课文摘录:17世纪时,荷兰已经成为欧洲资本主
Whenastudentsaidinclass,"Igoedthereyesterday,"theteacherresponded,"Sayitagain,please."Theresponseisanexampl
WhichofthefollowingmaterialsisNOTappropriateforateachertouseinlisteningpractice?
Coastsmarktheareawheredrylandmeetsoceansorotherlargebodiesofwater.Theyareoneofthemostactiveenvironmentsfo
Thestudyhighlightshowoursenseofrightandwrongisn’tjustbasedon______,religionandphilosophy,butalsoonthebiolog
Whichofthefollowingdoesn’tcontainliaison?
Whensaying"It’snoisyoutside"togetsomeonetoclosethewindow,thespeakerintendstoperforma(n)______.
Scottishislandisnowawindsweptislandboastingpinemartens,reddeerandpuffins.But170millionyearsago,someverydiff
Scottishislandisnowawindsweptislandboastingpinemartens,reddeerandpuffins.But170millionyearsago,someverydiff
随机试题
酸中毒时,组织缺氧改善的主要机制是
垫片的选择主要根据管内压力和介质的性质等综合分析后确定。()
Peopleoftenshowtheir【36】bythebodypositionsthey【37】.Thesecancontradict【38】youaresaying,especiallywhenyouaretryin
患者女,2008年5月30日入院。26岁,农民。因无明显诱因出现烦躁、焦虑、抑郁、怀疑被人议论和被害5个月,2月前出现四肢近端阵发性发绀,腕、足、踝关节红、肿、热、痛并指端发麻,进行性出现皮肤变黑、色素沉着、双侧颜面部呈对称性皮疹,口唇色素沉着并增厚,面
葡萄球菌肺炎常见
纳税人购买进口自用的应税车辆,车辆购置税的计税价格为()。
中外合作企业的合作各方应在法定期限内缴付出资,该法定期限是合同签订后6个月内。()
下列有关审计程序种类的说法中错误的是()。
Consumersandproducersobviouslymakedecisionsthatmoldtheeconomy,butthereisathirdmajor【C1】______toconsidertherole
Distanceeducationisenrollmentandstudywithaneducationalinstitutionthatprovideslessonmaterialspreparedinasequenti
最新回复
(
0
)