A slow，gradual fall of the barometer indicates approaching（）.<br>A:gale force winds within 12 hours<br>B:blizzard conditions<br>C:deteriorating or unsettled weather<br>D:heavy，wind driven rain

A slow，gradual fall of the barometer indicates approaching（）.
A:gale force winds within 12 hours
B:blizzard conditions
C:deteriorating or unsettled weather
D:heavy，wind driven rain

出自：海船船员证

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