题目内容

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

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Thunderstorms progress three definite stages: cumulus stage, mature stage and _______ stage.

A. dispersing
B. dispelling
C. dissipating
D. dispatching

When conditions permit, you should ______ thunderstorms.

A. avitate
B. navigate
C. communicate
D. curcumnavigate

When the crew determines circumnavigate is possible, they merely _______ course to take them around storm.

A. alter
B. altar
C. after
D. offer

When the crew determines circumnavigate is possible, they merely alter course to take them ________ storm.

A. around
B. above
C. off
D. on

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