A person who carries on an abnormally dangerous activity is strictly liable for damage characteristic to the risk presented by the activity and resulting from it.

如某一异常危险活动具有导致损害的特有风险并且实际导致了损害，那么实施这一活动者应对这种损害负严格责任。

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To study the characteristic of sleep spontaneous electric activity of the brain at high altitude.

目的：探讨移居高原青年睡眠自主脑电活动的特点；

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By the analysis of basic characteristic of old people outdoor activity and their body, the article discuss the matter of humanity design o fold people activity space of city square.

通过对老人户外活动的基本特点和身体特点分析，探讨城市广场中老人活动场所的人性化设计问题。

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