单项选择题
A.for B.by C.at D.to
A.Oxygen deficient spaces B.Compartments containing poisonous vapors C.Fighting fires that produce heavy smoke D.Underwater search
A.weigh down the anchor B.lubricate the anchor C.repel dangerous fish D.smooth the sea
A.soaking B.settling C.sinking D.bedding in
微信扫一扫,加关注免费搜题
