There is a long history of vocational education in this country.
美国这个国家的职业教育有着很长的历史。
It introduced the research history, concept and occupational risk factors of vocational exposure.
介绍了职业暴露的研究简史、概念及职业危险因素。
Based on the author's teaching practice in a vocational college, the essay displays the reformation in the education of chemistry history in chemical engineering specialty.
本文根据作者在职业学校的教学实践,提出了在化工专业开展化学史教育的一些形式和方法。
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