单项选择题
varnish()
A.凡力水
B.面漆
C.底漆
D.羊角
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单项选择题
bulkhead()
A.舱壁
B.舷墙
C.吃水
D.舷梯
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单项选择题
rat guard()
A.灭鼠剂
B.挡鼠板
C.鼠疫
D.守卫
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