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 ic 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 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. mercial flights by 1960. Early models often failed to withstand crashes, however, so in 1965 the device was pletely 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（抵挡）massive force and temperatures up to 2,000℉. When submerged（潜入水中）, 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.
【小题1】What does the author say about the black box?A．It ensures the normal functioning of an airplane.B．The idea for its design es from a ic book.C．Its ability to ward off disasters is incredible.D．It is an indispensable device on an airplane.【小题2】. What information could be found from the black box on the Yemeni airliner?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.【小题3】 Why was the black box redesigned in 1965?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.【小题4】 What do we know about the black boxes from Air France Flight 447?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.C
网友回答
(答案→)C
解析：
【小题1】C细节题。由Their ability to withstand almost any disaster makes them seem like something out of a ic book. They’re known as the black box.可知其抵御灾害的能力是令人难以置信的，故选C
【小题2】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。
【小题3】C倒数第二段Early models often failed to withstand crashes, however, so in 1965 the device was pletely 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。
【小题4】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。