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()是警察个体道德实践活动的第一个环节。

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试简述防火墙的特性和作用。

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Fair and(1) competition in government procurement around the world is good business and good public policy. Competitive pricing, product(2)and performanceimprovements result from competitive practices and help ensure that government authoritiesget the best (3)for the public they serve.空白(2)处填()

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C. crisis
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