题目内容
13.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 (潜水艇) detected the device's homing signal five days later,the discovery marked a huge step toward determining the cause of a tragedy in which 152passengers 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 model 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 1965the 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 (起落架舱).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 (隔绝的) case and surrounded by a quarter-inch-thick panels of stainless steel,the boxes can withstand massive force and temperatures up to 2,000℉.When submerged,they're also able to emit signals from depths of 20,000ft.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 20deep-sea crashes over the past 30years,only one plane's black boxes were never recovered.
24.What information could be found from the black box on the Yemeni airliner?A
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.
25.Why was the black box redesigned in 1965?C
A.New materials became available by that time.
B.Too much space was needed for its installation.
C.The early models often got damaged in the crash.
D.The early models didn't provide the needed data.
26.Why did the Federal Aviation Authority require the black boxes be painted orange or yellowC?
A.To distinguish them from the colour of the plane.
B.To caution people to handle them with care.
C.To make them easily identifiable.
D.To conform to international standards.
27.What do we know about the black boxes from Air France Flight 447?A
A.There is still a good chance of their being recovered.
B.There is an urgent need for them to be reconstructed.
C.They have stopped sending homing signals.
D.They were destroyed somewhere near Brazil.
分析 本文主要讲的是黑匣子.他们记录了你要去哪里,你的旅行是否你的飞机上的一切运作正常;几乎能经受住任何灾难,这就是黑匣子.当飞机失事时,黑匣子就是识别真相的有力证据.1958,澳大利亚科学家戴维Warren研发了一个飞行记录器,高度、速度、方位等基本信息.这是黑盒子的开端.现代飞机有两个黑盒子:一个录音机,跟踪飞行员的对话,和飞行数据记录器,监控燃料量,发动机的噪声和其他的操作功能,帮助研究人员重建了飞机的最后时刻.耐压耐高温.在过去的三十年的深海里,只有一架飞机的黑匣子没有恢复.
解答 ACCA
24.A 由第二段第1,2行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.可知,这个黑匣子里面有很多的数据可供分析使用,故A正确.
25.C倒数第二段Early models often failed to withstand crashes,however,so in 1965 the device was completely redesigned…文中提到,早期的黑匣子经常抗不住空难的破坏(failed to withstand crashes),因此在1965年,黑匣子重新设计(redesigned),所以答案为C.
26.C 根据painted orange or yellow to aid visibility."被刷成橙色或黄色来提高能见度.根据常识,我们知道在飞机失事时要找到黑匣子,黑匣子就一定要显眼,所以刷成橙色和黄色容易会被人发现.故选C.
27.A最后一段Experts believe the boxes from Air France Flight 447,which crashed near Brazilon 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.文中提到,专家相信法航447号的黑匣子是在水下20000英尺的深度,接着指出,但是统计数据显示他们仍然可能出现,即有可能被找到,接下来的具体统计数据也进一步说明了这一点,所以答案为A.
点评 本文主要讲了"黑匣子"的一些相关事宜.对于推理题的考查较多,在解答这类问题时要求学生抓住题干文字信息,采用针对性方法进行阅读,根据词义关系推断具体细节,结合上下文提供的语境和信息进行概括和判断.
A.marketed | B.experiene | C.increasd | D.deliberaty | E.indicate | |
F.controlled | G.potentialy | H.currenty | I.conveniene | J.backed | K.access |
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