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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.
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热门试题

单项选择题A．The man wants to meet the woman’s parents.B．The man doesn’t know the woman’s plan.C．The woman is happy to go with the man.D．The woman won’t be able to take a vacation.

A．The man wants to meet the woman’s parents.
B．The man doesn’t know the woman’s plan.
C．The woman is happy to go with the man.
D．The woman won’t be able to take a vacation.

单项选择题A．Rich people are not happy.B．Being rich is the best thing in the world.C．Being rich is not always a good thing.D．Rich people are usually with their families.

A．Rich people are not happy.
B．Being rich is the best thing in the world.
C．Being rich is not always a good thing.
D．Rich people are usually with their families.