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单选题
《船舶签证簿》使用完毕后,应由船舶或船舶所有人保留()
A
一年
B
二年
C
三年
D
五年
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If the blue ends of the magnets are aft you should lower the fore-and-aft trayC
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Ⅱ,ⅢC
Ⅰ,ⅢD
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a failure of the motorB
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