失速警告系统在计算失速速度时，不必需的参数是（）。

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 （ ） ．

The runway number of a runway with a magnetic heading of 083° is （ ） ．

Which of the following statement is not true?

The number on the runway is given in relation to （ ）．

Industrial areas typically produce more fog since they （ ） ．

Hydroplaning is not likely to occur at high speeds on （ ） runways.