题目内容

During a wind shear situation, the effects can be ________ or very dramatic depending on wind speed and direction of change.

A. subtle
B. little
C. noticeable
D. obvious

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The ________ of a microburst is about 15 minutes during which it can produce downdrafts of up to 6,000 feet per minute.

A. time
B. range
C. lifespan
D. distance

Clear air turbulence weather is the erratic movement of air masses in the ________ of any visual cues, such as clouds.

A. shortage
B. view
C. absence
D. presence

Clear air turbulence is impossible to detect either with the naked eye or with ________ radar, meaning that it is difficult to avoid.

A. modern
B. conventional
C. outdated
D. remote

Because aircraft move so quickly, they experience sudden ________ accelerations or “bumps” as they rapidly cross invisible bodies of air which are moving vertically at many different speeds.

A. excessive
B. quick
C. unwanted
D. unexpected

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