标题: 求助B9 快考了，好心人帮帮忙吧！！ [打印本页] 作者: 谢姒涵 时间: 2010-10-9 00:58 标题: 求助B9 快考了，好心人帮帮忙吧！！ B7. The following appeared as part of an article in a daily newspaper:
“The computerized onboard warning system that will be installed in commercial airliners will virtually solve the problem of midair plane collisions. One plane’s warning system can receive signals from another’s transponder—a radio set that signals a plane’s course—in order to determine the likelihood of a collision and recommend evasive action.”