单选题Stand of the tide is that time when（）.Athe vertical rise or fall of the tide has stoppedBslack water occursCtidal current is at a maximumDthe actual depth of the water equals the charted depth
单选题
Stand of the tide is that time when（）.
A
the vertical rise or fall of the tide has stopped
B
slack water occurs
C
tidal current is at a maximum
D
the actual depth of the water equals the charted depth
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