— What are you doing?
— We ____ our homework. [ ]
A. are doing
B. doing
C. do
答案:A
海上航行的机动船甲,见左舷挂有尖端向下圆锥体号型的帆船与本船航向交叉驶近,存在碰撞危险,甲船应:()
A.右转鸣一短
B.左转鸣二短
C.保向保速
D.减速、停车
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