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_______ is not included in the three conditions necessary for th

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An area of severe weather often forms well _______ the fast-movi

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_______ would decrease the stability of an air mass.

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When the temperature rises, first of all,

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Airmasses are classified according to the regions where they ori

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Which of the following is not a general weather characteristic a

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When flight speed is constant, the greater the air density,

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A warm front is one where _______ .

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A cold front is one where _______ .

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When judging the wing speed by wind sock, if the wind sock is at

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