单项选择题

Which of the following can be labeled as a politically motivated sabotage of a computer system?（）

A.Sabotage of a university computer
B.Sabotage of hospital computer
C.Sabotage of computer at a secret training base
D.Sabotage of a factory computer

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问答题

一个成熟的公共服务系统一旦建立起来，它将成为社会持续发展的重要推动力量。

单项选择题

A.asks
B.invites
C.calls for
D.reacts to