题目内容

Airmass thunderstorms are most common during ________ .

A. hot summer afternoon
B. cold winter afternoon
C. warm spring afternoon
D. cool autumn afternoon

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_______ thunderstorms can occur in late spring and summer during the late night or early morning.

Airmass
B. Frontal
C. Nocturnal
Daytime

Which one is not a hazard produced by thunderstorm?

A. lightning
B. turbulence
C. tornado
D. CAT

The _______ cloud is the most turbulent of all clouds.

A. cumulus
B. cumulonimbus
C. convection
D. updraft

Indications of severe turbulence within the storm system include all the following but ______.

A. cumulonimbus cloud
B. frequent lightning
C. roll clouds
D. gusty wind

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