相关题目
After the first observation and issuing of SNOWTAM, if the snowfall continues or runway ices over, observation should be made every （ ）hour(s), and new SNOWTAMs should be issued until all flights are finished.
（ ）is the measurement unit to measure the depth of snow on the runway, taxiway and apron.
If the runway-in-use is not considered （ ） for the operation involved, the pilot-in-command may request permission to use another runway.
When encountering turbulence whose intensity is moderate or above, the A/C should keep（ ）.
As the aircraft’s circling slope increases, stall speed （ ） .
Based on the maximum wing span and space between the outer main gears prescribed in the airport flight region grading index, airports are divided into （ ） 5 grades.
The weight of A/C being definite, the rate of climb is determined by （ ） .
The field length of air transport airports whose flight region grading index is I is（ ）for grade 1, （ ） for grade 2, （ ） for grade 3 and （ ） for grade 4.
The length of RWY 09 at a certain airport is 3200m, the threshold is displaced 150m: the available rolling distance for takeoff is （ ）m, and the available rolling distance for landing is （ ）m.
Available landing distance (LDA) refers to （ ） .
