Along the river. B. On the right side of the road. C. In a nice park. D. In a gym.
A. By car. By train. C. By walking. D. By jogging.
A. 总供给大于总需求 B. 总供给小于总需求 C. 总供给等于总需求 D. 总供给与总需求无关系
A.庇古税 B.财政补贴 C.数量管制 D.确立产权
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