唐代诗人杜牧在《过华清宫绝句》中写道:“一骑红尘妃子笑,无人知是荔枝来”,是指由于当时交通不便,需要从四川一带用快马运送荔枝到长安,供贵妃享用。这体现了运输的
A.空间效用
B.非储存性
C.同一性
D.规模经济
正确答案是A
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At the conference the chairman made a detailed ( ) of the international economic situation. (appraise)
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