lesson 21 短听力:听一遍录音,选择最佳答案。
A. Forbidden area
B. Helicopter training area
C. Thunderstorm area
D. Permitted area
lesson 21 短听力:听一遍录音,选择最佳答案。
A. 20 degrees right
B. due to weather
C. due to traffic
D. 30 degrees left
lesson 21 短听力:听一遍录音,选择最佳答案。
A. Due to turbulence and icing.
B. Due to moderate turbulence.
C. Due to weight.
Due to spacing.
lesson 21 短听力:听一遍录音,选择最佳答案。
At FL 360 or below.
B. Ahead and above FL 380.
C. Request descent to FL 360.
D. Ahead and below FL 380.