Objective:To know about health education demands of breast cancer patients and to analyze its causes.

了解乳腺癌病人对健康教育的需求并分析其原因。

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So it is necessary to analyze its causes, to expatiate its popularity and major symptoms, to work out vaccination system and top…

母猪繁殖障碍造成的经济损失严重，因而有必要对发病原因进行分析，阐述流行及主要表现，制定合理免疫程序，提出综合防制措施。

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Objective To investigate the force variation during the anterior cervical surgery while distracting the cervical vertebrae and analyze its causes.

目的研究颈椎前路手术椎间撑开力的变化及其原因。

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