单项选择题

A．Workers.
B．Teachers.
C．Students.
D．Doctors.
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单项选择题
A．His colleagues are kind to him.B．The restaurant is near the campus.C．He works long hours.D．The pay is not bad.
A．His colleagues are kind to him.
B．The restaurant is near the campus.
C．He works long hours.
D．The pay is not bad.
单项选择题
A．By computerized traffic control and personal computers at home.B．By computerized cash registers in the stores.C．By computerized billing of credit card companies.D．All of above items mentioned.
A．By computerized traffic control and personal computers at home.
B．By computerized cash registers in the stores.
C．By computerized billing of credit card companies.
D．All of above items mentioned.
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