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【单选题】
负责航行值班的驾驶员有关的设备进行定期检查()。1应确保系统正常工作,经常检查水手的正确性,每班应检查自动舵运转情况并核对上下罗经一次;2使用自动舵时,每班至少试验手一次;3使用手时,每班应至少检验自动舵一次;4每班应检查一次自动舵与手的转换操作。A.
①②④
B.
①③④
C.
②
D.
④
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