单项选择题

A．He got lost.
B．A taxi was faster.
C．He lost his map.
D．The policeman advised him to.
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单项选择题
A．It is not easy to see the shortage of experts in the villages.B．Many doctors and engineers are sent to the villages to make up for the shortage of experts.C．Expert medical systems are widely used in developing countries.D．Expert systems are owned by wealthy farmers and businessmen.
A．It is not easy to see the shortage of experts in the villages.
B．Many doctors and engineers are sent to the villages to make up for the shortage of experts.
C．Expert medical systems are widely used in developing countries.
D．Expert systems are owned by wealthy farmers and businessmen.
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