| 2. | Overview of the history of extension in western north america , helping rural adults learn , planning an extension program , extension activities , methods of promotion of extension activities , teaching aids , evaluating an extension program , and example extension plan 所涉及内容包括:北美西部地区技术推广历史回顾帮助乡村成年人学习计划一个技术推广项目推广活动促进技术推广活动的方法教学帮助评估一个技术推广项目技术推广计划案例等 |