单项选择题

A．The computer expert systems.
B．The shortage of experts in the countryside.
C．The way to use the medical expert system.
D．The shortage of many things in developing countries.
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单项选择题
A．The researchers in Chicago.B．The doctors in Chicago.C．The medical students at the University of Chicago.D．The researchers in a dream lab at the University of Chicago.
A．The researchers in Chicago.
B．The doctors in Chicago.
C．The medical students at the University of Chicago.
D．The researchers in a dream lab at the University of Chicago.
单项选择题
A．He didn’’t like physics any more.B．His eyesight was too poor.C．Physics was too hard for him.D．He had to work to support himself.
A．He didn’’t like physics any more.
B．His eyesight was too poor.
C．Physics was too hard for him.
D．He had to work to support himself.
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