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文件名称:轮机英语4附有答案.docx
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轮机英语4[复制]
588.AxialsealingofNo.2seawaterpumpneedtobereplaced.[单选题]*
AAxialpistonpumpneedtobereplaced.
BAxialsealingwillberenewed.(正确答案)
CFreshwaterpumpistobereplaced.
DSeawaterpumpistobereplaced.
589.Somevanesinairpumpofsewageplantarebroken.[单选题]*
A