The article sum up teaching - learning retrospective, it heighten on the theory, the author teaching -learning of computer operation system and foster method of students'ability.
文章总结教学实践，从理论上进行提高，探讨了计算机操作系统的教学与学生能力的培养方法。
Methods. In this retrospective study (1994–2003), medical records and radiographic findings of patients with spinal TB were reviewed at 7 teaching hospitals in South Korea.
方法：在这一回顾性研究中（1994-2003），我们复习了韩国7所教学医院中脊柱结核患者的病历和X线资料。
A retrospective cohort study of culture-positive HCAP over 6 years (January 2003-December 2008) was performed at Barnes-Jewish Hospital, a 1200-bed urban teaching hospital.
这项回顾性队列研究开展了六年，在巴恩斯犹太医院。这是一个1200床的教学医院。
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