单项选择题
锚已抓底了吗?()
A. Is the anchor up and down? B. Is the anchor fouling? C. Is the anchor holding? D. Is the anchor across?
单项选择题 抛左锚,五节入水!()
单项选择题 有时风大流急,船舶靠码头时必须掉头顶流。()
单项选择题 备锚,摇“备车”钟。()