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测量精度分为：正确度、精密度、准确度。在误差理论中，（）表征系统误差的大小程度，（）表征随机误差的大小程度，（）表征系统误差和随机误差的综合结果

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参考答案：正确度;精密度;准确度

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公安机关在社会治安综合治理中，在有关部门协作配合和广大人民群众的支持下，积极完成的任务包括（）。

A．充分发挥公安机关的职能作用，依法严惩各种严重刑事犯罪分子

B．加强基层工作，坚持“打防结合，预防为主”的原则

C．配合有关部门搞好维护社会稳定的各项工作

D．除了治安行政管理工作之外，抓好其他方面的行政管理，如市场、工商、财贸、税务、卫生、海关、教育等方面的行政管理，也可以大量地减少治安问题的发生
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Beijing: The United States and North Korea had their first ________in four months here this afternoon as part of the ________negotiations on how to end North Korea’’s nuclear program, but diplomats played down prospects for________.James A. Kelly, assistant________, and Kim Yong II, North Korea’’s deputy foreign minister, met ________of formal discussions, ________on direct dialogue that began after a stormy meeting ________in which North Korea warned that it was moving quickly to ________nuclear arms.The Bush administration had insisted ________that it would only hold talks with North Korea ________because, it argued, only ________pressure would persuade North Korea to________. It got its way when North Korea dropped its insistence on ________and agreed, after extensive efforts by China, to hold unusual simultaneous negotiations with ________,________,________and ________as well as the United States.Though Bush administration officials had not ________talking privately with the North Koreans during________, the fact that Mr. Kelly and Mr. Kim met on the first day was seen as a sign of ________by the American side.
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