题目

Lucy fell asleep_______ she was listening to music.A．beforeB．whileC．afterD．as soon as 答案：B解析:略两艘海轮，甲轮位于北纬50°、东经160°，乙轮位于北纬30°、东经175°，乙 轮位于甲轮的（　　）A．东北方B．东南方C．西北方D．西南方