2013年12月四级听力模拟试题十四_大学英语听力

2013年12月四级听力模拟试题十四

　　just heard. For blanks numbered from 44 to 46 you are required to fill in the missing information.

　　For these blanks, you can either use the exact words you have just heard or write down the main

　　points in your own words. Finally, when the passage is read for the third time, you should check

　　what you have written.

　　On Sept.11, the nations aviation system quickly and safely landed almost 4,500 planes that were in the air when the terrorist attacks took place. How was this accomplished? What was it like inside air traffic control centers and at airline headquarters? How was the decision made to land all the planes? And how did controllers execute it?

　　Some USA TODAY reporters spent seven months interviewing more than 100 people involved in key decisions that day. The reporters traveled to New York, Washington, Chicago, Texas and Atlanta.

　　The scenes, thoughts and quotes in the stories are based on interviews with participants or with sources who had access to tape recordings. Accounts of the days events were verified. Reporters and editors also scrutinized hundreds of pages of records, including transcripts of radio calls with the four hijacked jets and a log kept by the Federal Aviation Administration.

　　USA TODAY compiled and analyzed data from several sources. A key source was the FAA radar data from the Traffic Situation Display. The system tracks all aircraft in the United States and Canada that have filed flight plans: commercial jets, private planes, cargo jets and military aircraft. It also estimates the location of planes over the Atlantic and Pacific oceans flying to and from North America.