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单项选择题Which of the following is true about efficient markets

A．All the markets are efficient markets.
B．There are no profit opportunities in efficient markets.
C．In efficient markets, professionals have an advantage over non-professionals.
D．Efficiency is given priority in efficient market.

单项选择题It is implied that cloning draws fierce criticism from ethicists, religious leaders and US President Bush because______.

A．it is conceptually hyped
B．it is morally controversial
C．it is extremely difficult
D．it is not scientifically viable

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单项选择题According to the passage, we can be sure that______.

A．organised crimes rampaged in the US during the era of Prohibition
B．organised crime can profit more from handling and reselling of stolen goods than from trade in pornographic literature
C．special measures have been taken to crack down any form of illegitimate activities
D．all of the above