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The tailshaft sealing arrangement found a little lube oil leaky and caused a lot of seawater into the bearing, the step should be taken as a makeshift is（）
A:dropping lube oil for lubrication, reducing the pollution to the sea
B:setting a temporary gravity oil tank and enhanced the position properly
C:lubricating with the used lube oil
D:lubricating with the fresh water and navigation in a lower speed

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出自：海船船员证

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