单项选择题

A．A system which trains computer experts.
B．A system which trains doctors.
C．A group of experts who can provide professional advice.
D．A computer program which can provide professional advice.
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单项选择题
A．Scholars.B．Scientists.C．Greeks.D．Divers.
A．Scholars.
B．Scientists.
C．Greeks.
D．Divers.
单项选择题
A．A picture on the wall.B．A picture that hasn’t been enlarged.C．A picture the photographer took on his vacation this year.D．A picture taken by the photographer’s friend.
A．A picture on the wall.
B．A picture that hasn’t been enlarged.
C．A picture the photographer took on his vacation this year.
D．A picture taken by the photographer’s friend.
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