单项选择题

According to the passage, many people can use ______ at the same time.

A．home computers
B．personal computers
C．microcomputers
D．mainframe
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单项选择题
Microcomputers are also known as ______ .
A．home computers
B．minicomputers
C．special computers
D．supercomputers
单项选择题
One possible reason why spring is the best season for thinking is that ______ .
A．all nature, including man, is growing then
B．it lasts longer than the other seasons
C．it has longer daytime than winter
D．both B and C
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