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單項(xiàng)選擇題

Fog is most commonly associated with a(n)（）.

A.warm front at night
B.low pressure area
C.anticyclone
D.lack of frontal activity

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單項(xiàng)選擇題

Charted depths are decreased（）2 meters．

A.in
B.on
C.with
D.by

單項(xiàng)選擇題

Charted depths（）by 2 meters due to state of the winds．

A.is decreased
B.decreased
C.decreases
D.are decreased

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