【正文】
ment an airliner takes off② to the moment it lands, every movement is watched on radar screens. Air traffic controllers tell the pilots exactly when to turn, when to climb, and when to e down. ( Section A綜合運用 ) The air traffic controllers around a busy airport like London Heathrow may deal with 2, 500 planes a day. Not all of them actually land at the airport. Any plane that flies near the airport es under the orders of the controllers there. Few③ mistakes can be made. ( Section A綜合運用 ) Recently a disaster almost happened. Two planes were flying towards the airport. One was carrying 69 passengers fro