单项选择题

A．To look back to the early days of computers.
B．To explain what technical problems may occur with computers.
C．To encourage necessary investment in computers.
D．To warn against a mentally lazy attitude towards computers.
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单项选择题
A．The advantages of an economy based on farming.B．Reason that farmers continued using river transportation.C．The role of cotton in the United States economy.D．Improved methods of transporting farm crops.
A．The advantages of an economy based on farming.
B．Reason that farmers continued using river transportation.
C．The role of cotton in the United States economy.
D．Improved methods of transporting farm crops.
单项选择题
A．The woman bought the jeans cheaper than the man’s wife.B．The jeans the woman bought was worth the money.C．The man’s wife bought two jeans for 150 yuan.D．The man’s wife is good at bargaining.
A．The woman bought the jeans cheaper than the man’s wife.
B．The jeans the woman bought was worth the money.
C．The man’s wife bought two jeans for 150 yuan.
D．The man’s wife is good at bargaining.
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