Result: The results using multimedia technology of seeing and hearing to educate "Cognition Topic" was much better than that just using traditional style to educate.
结果：使用多媒体视听技术进行“认识主题”的教学，其认识及操作效果明显优于传统方式的教学。
Risk perception is a psychological experience and cognition topic factors that affect our daily life and work, as well as an index that can measure the psychological panic of the public.
风险认知是人们对影响日常生活和工作的各种因素的心理感受和认识，是测量公众心理恐慌的指标。
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