2014英语四级听力练习慢速3.15(2)_大学英语听力

2014英语四级听力练习慢速3.15(2)

　　Air safety expert John McGraw remembers the National Transportation Safety Board taking action after the French jet went missing. He says US officials called for continuous download of an aircrafts flight data recorder information in case of emergencies.

　　In the past they havent been able to justify installing that kind of equipment, because its expensive, and because there hadnt been that many accidents where it would have come into play. This will certainly provide some additional motivation and there may be calls to do that.

　　Malaysia Airlines Flight 370 was last seen on radar above Vietnam and Malaysia. Air traffic controllers in both countries say they did not receive any message that the plane may have been in trouble. On Tuesday, Malaysian media reported that the Malaysian military had noted the aircraft flying toward the countrys west coast. That is far from where controllers lost contact with the plane.

　　The next day, China released satellite images showing three large objects floating in waters between Malaysia and Vietnam. But China later said it could not confirm the objects belonged to the missing aircraft.

　　The Wall Street Journal reported that the plane could have stayed in the air for several hours past the time of its last confirmed location. The newspaper later said that the plane continued to send information about its engines and performance to satellites for five more hours. That suggests Flight 370 could have remained in the air or was on the ground somewhere. Why the signals stopped is unclear.