单项选择题

According to this passage, how long would the computer be down

A．For 10 minutes.
B．Between 10 minutes and 2 hours.
C．It would be down for two hours.
D．It wasn’t clear.
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单项选择题
The last paragraph suggests that ______.
A．a modern computer won’t be down
B．computers can take the place of humans
C．sometimes a computer may bring suffering to people
D．there will be great changes in computers
单项选择题
The best headline for the article is ______.
A．When the Computer Is Down
B．The Most Frightening Words
C．The Computer of the Airport
D．Asking the Computer
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