Lesson 9 短对话选择-5
A. FL220
B. 9000feet
C. FL180
D. FL210
Lesson 9 短对话选择-6
A. 3000feet
B. FL230
C. FL214
D. 7000feet
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