填空题

This passage is mainly about______.

【参考答案】

how to minimize the risks of the network
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填空题
The expression around-the-clock (Line 4, Para. 2) most probably means______.
单项选择题
A．To observe people’s attitude towards strangers.B．To see how people get along with their friends.C．To change people’s behavior in social life.D．To find out how shy people are.
A．To observe people’s attitude towards strangers.
B．To see how people get along with their friends.
C．To change people’s behavior in social life.
D．To find out how shy people are.
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