单项选择题

旅行社电子商务(ETA)的核心是(    )。 A.
旅行社 B.
一系列规范的业务流程
C.
互联网技术 D.
在线旅游服务模式

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单项选择题
科斯定理主张用产权明确化的办法来解决外部性问题。()
A.正确
B.错误
未分类题
The author suggests that the role of large institutions as stockholders differs from that of the “old-stylE.capitalist” in part because large institutions______A.invest in the stock of so many companies that they cannot focus attention on the affairs of any single corporationB.are prohibited by law from owning a majority of a corporation’s stockC.are influenced by brokers who advise against long-term ownership of stocksD.are able to put large amounts of stock on the market without depressing the stock’s valueE.are attracted to the stocks of corporations that demonstrate long-term gains in productivity
A.invest
B.are
C.are
D.are
E.are
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