This paper defines the concept of family violence, and analyzes its popularity, hazard, potency, hidden-ness, repetition, precipitation and preventability.

本文对家庭暴力的概念及家庭暴力具有的普遍性、危害性、隐蔽性、反复性、突发性、可预防性特点进行了一定的分析。

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Objective:To assess existence and preventability of adverse drug events(ADEs) and to investigate excess length of stay and extra hospital charges of the ADEs.

目的：调查住院病人药物不良事件（ADE）发生率、因ADE而造成的医疗费用、延长的住院时间及ADE的可防范率。

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This paper introduces theory, characteristic, maintainer and preventability maintenance of contact and non-contact thickness gauge and ray source of that are described.

本文介绍了接触式测厚仪和非接触式测厚仪的工作原理、特点、保养及预防性维护，同时对非接触式测厚仪的射线源也进行了阐述。

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