单项选择题

A．Many doctors and engineers are sent to the villages to make up for the shortage of experts.
B．It is not easy to see the shortage of experts in the villages.
C．Expert systems are owned by wealthy farmers and businessmen.
D．Expert medical systems are widely used in developing countries.
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单项选择题
A．Because he often forgets to tell the people he is taking pictures of them.B．Because he prefers to portray people who are not aware of the camera.C．Because he likes pictures of people who pose for the camera.D．Because he is afraid that people wouldn’t allow him to photo- graph them.
A．Because he often forgets to tell the people he is taking pictures of them.
B．Because he prefers to portray people who are not aware of the camera.
C．Because he likes pictures of people who pose for the camera.
D．Because he is afraid that people wouldn’t allow him to photo- graph them.
单项选择题
A．She is going to study.B．She is going to teach.C．She is going to travel.D．She is going to visit friends.
A．She is going to study.
B．She is going to teach.
C．She is going to travel.
D．She is going to visit friends.
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