单选题If the coxswain of your lifeboat gives the command HOLD WATER you should（）.Acomplete the stroke，raise your oar slightly，swinging the oar slightly forward，and place it in the boatBlift the oar in a vertical positionCcomplete the stroke and hold the oar out of the waterDdip the blade of your oar into the water vertically and hold it perpendicular to the keel line
单选题
If the coxswain of your lifeboat gives the command HOLD WATER you should（）.
A
complete the stroke，raise your oar slightly，swinging the oar slightly forward，and place it in the boat
B
lift the oar in a vertical position
C
complete the stroke and hold the oar out of the water
D
dip the blade of your oar into the water vertically and hold it perpendicular to the keel line
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