Lesson 9 短对话选择-7
A. follow D08, climb to 5700m
B. follow D08, climb to 5700m at 30
C. follow D08 request higher level from Control
D. follow D08 request FL330 on 128.3
Lesson 9 短对话选择-8
A. Heading
B. Flight Level
C. Position
D. Bearing
lesson 9 短对话选择-9
A. FL180 is not available
B. Conflicting traffic
C. ATC reason
D. Control problem
Lesson 9 短对话选择-10
A. 3000~9000 feet
B. 3000~7000 feet
C. 3000~5000 feet
D. 5000~7000 feet
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