题目内容
（请给出正确答案）
A.登机口变更
B.航班延误
C.航班取消
D.正常登机
参考答案
简答题官方参考答案
（由简答题聘请的专业题库老师提供的解答）
网友提供的答案
更多“In what cases flights can’t take off on time？”相关的问题
【填空题】Lesson 5 听力填空-1 What is AIr Traffic Control 1. Listening to the recording and answer the following questions: (自己口头回答，不用写答案） Question One : What services does air traffic control provide？ Question Two: What kinds of separation are applied by ATC？ Question Three: Who has the final responsibility for flight safety？ Question Four : Can the flight crew deviate from ATC instructions？ 2. Listening to the recording again and fill in the blanks with words you have heard: Air traffic control is a service provided by ground-based controllers for the aircraft on the ground and in the air. It has three primary purposes: first, to separate aircraft to 1 ; second, to organize and 2 the flow of traffic; third, to 3 and other support for pilots when able. Preventing collisions is referred to as separation. Separation is a term used to prevent aircraft from coming too close to each other by use of 4 vertical and 5 separation minima. Many aircraft now have 6 systems installed to act as a backup to ATC observation and instructions. Aircraft may fly with or without the use of the air traffic control system. If with, the airspace they fly within is called " 7 "airspace, if without, then “ 8 ”airspace. ATC may 9 that pilots are required to follow, or advisories to 10 pilots operating in the airspace. In all cases, however, the pilot in command has 11 for the safety of the flight, and may 12 from ATC instructions in an emergency.
The underlined phrase "such a reaction" (Para. 3) most probably refers to ______.
A．making a choice between "flight and fight"
B．reaction to cases both chemically and physically
C．responding to crises quickly
D．losing heart at the .signs of difficulties
What aspect of airplane flight was inspired by bee observations？
A．Landing manner.
B．Low speed take-off
C．Poor-weather guidance system.
D．Evasive guidance systems.
A、All prevalent cases
B、New cases
C、Old cases
D、Infected cases
What information does Barbara Rivers provide？
A．Her flight number
B．Her e-mail address
C．Her cell phone number
D．Her home telephone number
What are the speakers talking about？
A.A flight timetable.
B.The way to Union Street.
C.Hiring a taxi.
D.None above.
A..50 to .75 Mach
B..75 to 1.2 Mach
C.1.2 to 2.5 Mach
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