足少阴肾经腧穴主治______、______、肺、肾及经脉循行部位的病症。
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_______ is a sudden, drastic change in wind speed and/or wind direction over a small area. (P241)
A. Wind shear
B. Turbulence
C. Thunderstorm
D. Lightning
Thunderstorms produce some of the most dangerous weather elements in aviation, and you should avoid _____ them.
A. penetrating
B. to penetrate
C. penetrate
D. penetrated
There are three conditions necessary to create a thunderstorm: air that has a ______ towards instability, some type of lifting action, and relatively high moisture.
A. tendency
B. attendance
C. expectation
D. anticipation
There are three conditions necessary to create a thunderstorm: air that has a tendency towards _______, some type of lifting action, and relatively high moisture content.
A. inability
B. instability
C. stability
D. unstable