题目内容
5.You never see them,but they're with you every time you fly.They record where you're going,how fast you're traveling and whether everything on your airplane is functioning normally.Their ability to withstand (经受)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 the Comoros Islands in the Indian 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 detennining 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 model for a black box,which became a requirement on all US 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一the area least subject to impact--from its original position in the landing wells(起落架舱).That same year,the Federal Aviation Authority required that the boxes,which were never actually black,be painted orange or yellow to aid visibility.
Modem 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 quarter-inch-thick panels of stainless steel,the boxes can withstand massive force and temperatures up to 2000°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.
46.What does the author say about the black box?D
A.It ensures the normal functioning of an airplane.
B.The idea for its design comes from a comic book.
C.Its ability to ward off disasters is incredible.
D.It is an indispensable device on an airplane
47.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 the board.
C.The scene of the crash and extent of the damage.
D.Homing signals sent by pilot before the crash.
48.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.
49.Why did the Federal Aviation Authority require the black boxes be painted orange or yellow?C
A.To distinguish them from the color of the plane.
B.To caution people to handle them with care.
C.To make them easily identifiable.
D.To conform to international standards.
50.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 restructured.
C.They have stopped sending homing signals.
D.They were destroyed somewhere in Brazil.
分析 本文主要介绍了记录飞机飞行数据的黑匣子的发展历程和具体信息.
解答 46--50 DACCA
46.D 推理判断题.根据第一段可知,黑匣子记录了你去哪里,你飞得多快及飞机上的一切是否工作正常.即黑匣子是飞机上不可缺少的设备.故选D.
47.A 细节理解题.根据第二段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.说明这个黑匣子里是一些数据,这些数据可以分析飞机坠毁的原因.故选A.
48.C 细节理解题.根据第三段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.说明之前的黑匣子经常会在飞机坠毁中坏掉,现在重新进行设计.故选C.
49.C 细节理解题.根据第三段最后The same year,the Federal Aviation Authority required that the boxes,which were never actually black,be painted orange or yellow to aid visibility.说明人们把黑匣子粉刷成黄色或者橙色是为了容易寻找.故选C.
50.A 推理判断题.根据文章最后一句In the approximately 20 deep-sea crashes over the past 30 years,only one plane's black boxes were never recovered.说明这架飞机的黑匣子还没有找到,不过还是有可能性被找到的.故A正确.
点评 高考中选用的科技文往往反映的是当今人类最先进的科技水平和最新的科研成果.我们阅读它的过程其实就是学习科学知识,掌握科技信息的过程.然后,理解文章,分析文章,以阅读材料所提供的科学事实为依据,同时得出的结论还应符合基本的科普常识,对照时要特别注意范围大小、程度高低、数量多少、条件与结果、方法与目的、成就与问题、可能性与现实性.在细心对照基础上,经过一番分析、综合,然后就要根据题目要求对选项作出正确判断了,这些判断包括选项的表达是否符合原文的意思,对概念,文句的理解是否正确,对要点归纳是否全面等,从而排除错误选项,选择最合适的答案.
A. | can | B. | might | C. | need | D. | must |
A. | appeal | B. | appetite | C. | affection | D. | application |
A. | who | B. | which | C. | that | D. | when |