单项选择题

A．In 4 or 5 years.
B．In 6 weeks.
C．In 3 or 4 years.
D．In 36 weeks.
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单项选择题
A．Three.B．Four.C．Eight.D．Five.
A．Three.
B．Four.
C．Eight.
D．Five.
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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