如图所示，一艘海轮位于灯塔P的北偏东30°方向，距离灯塔4海里的A处，该海轮沿南偏东30°方向航行_1海里后，到达位于灯塔P的正东方向的B处．_刷题宝

题干

如图所示，一艘海轮位于灯塔P的北偏东30°方向，距离灯塔4海里的A处，该海轮沿南偏东30°方向航行____海里后，到达位于灯塔P的正东方向的B处．

上一题下一题 0.0难度选择题更新时间:2009-11-17 05:40:39

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4

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M

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