如果市场是强势有效的，则任何专业投资者的边际市场价值为零。()
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Judging from the context, the word "they"(Line 2, Paragraph 4) might refer to
A. the security risks.
B. the terrorist attacks.
C. environmental hazards of over-centralization.
D. the security risks, economic expenses, and environmental hazards.
It can be inferred from the passage that
A. computer networking will be helpful in the food industry.
B. 24-hour supermarkets are not very common.
C. few shopping centers are three-shift open at any hour.
D. 24-hour restaurants are not in practice in the great business capitals.
According to the passage, the trend of new culinary mosaic is most accelerated by
A. globalization.
B. remote ingredients and cooking styles.
C. great international hotel chains.
D. chefs of various nationalities.
The phrase "global cuisine"(Paragraph 4) probably means
A. a world of young people.
B. a world style. of cooking.
C. a specific food popular in the world.
D. world foods in general.
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