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单项选择题

What is the passage mainly about

A．The 23rd Olympic Games.
B．A race of high technology.
C．The application of high technology to the Olympics.
D．A sophisticated computer system.
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单项选择题According to the passage, the electronic message system

A．trained American athletes
B．kept the journalists informed of the results
C．controlled the traffic efficiently
D．helped the judges make final decisions

单项选择题Computers and high-tech tools did all the following for American athletes EXCEPT ______.

A．analyzing their performances
B．suggesting ways to improve
C．identifying their weaknesses
D．improving their performances easily