The proximity of pack ice may be indicated by（）.<br>A:changes in seawater salinity<br>B:glare on clouds on the horizon<br>C:changes in air temperature<br>D:icebergs

The proximity of pack ice may be indicated by（）.
A:changes in seawater salinity
B:glare on clouds on the horizon
C:changes in air temperature
D:icebergs

出自：海船船员证

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