Which type of precipitation is a product of the violent convection found in thunderstorms（）.

Which of the following is not a wind（）.

A.Growler
B.Norther
C.Levanter
D.Mistral

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Which condition suggests that your present position lies in the navigable semicircle of a tropical storm（）.

A.A backing wind
B.A veering wind
C.Sustained gale force winds
D.A strong wind that maintains a constant speed and direction

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