【简答题】甲、乙两地之间有往返运输需求,往返需求和成本见下图。 D main 和 D back 分别是往返运输方向的运输需求曲线,总运输需求曲线见图中 D total 。图中的一个循环周期的成本曲线表示甲、乙两地之间的运输供给曲线。 q *表示回程方向运价为零时的运输需求量; x *表示航班的均衡数量,它是由往返方向的运价水平共同决定的。 (1)甲、乙两地之间的往返运价如何制定才是有效率的运价? (2)往返...
【简答题】根据你所听到的内容,将短文补充完整。 Tom up early in the morning. He his breakfast. Then he rides his bike to school. He sees his friends on the playground. He football with them. In the classroom, Tom his new math tea...
【简答题】听录音,根据听到的内容,将下列短文补充完整。 May I have your attention please? Air China flight to Kunming is now boarding through Gate . Please collect all of your personal belongings and have your boarding pass ready as ...