相关题目
The official airport elevation is the highest part of the usable （ ） measured in feet above mean sea level.
The minimum safety altitude over a congested area is based on （ ） ．
Runway 26 can be a runway with a magnetic heading between （ ） ．
Runway 09 can be a runway with a magnetic heading between （ ） ．
Any runway that is between the magnetic headings of （ ） is designated with a single-digit runway number.
The runway number of a runway with a magnetic heading of 258° is （ ） ．
If an altimeter setting is not available before flight, the pilot should adjust the altimeter to （ ） ．
Airports without control towers are referred to as （ ） ．
A runway labeled “15R” on one end is labeled （ ） on the opposite end.
The numbers 09 and 27 on a runway may indicate that the runway is oriented approximately （ ） ．
