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利用废弃的材料让学生动手制作化学实验仪器不仅能培养学生节约资源的意识,而且能够促使学生学习模式的转变。随着化学实验课的进程推进,器材总会出现磨损,课程结束后废弃物排放也会导致不同程度的污染,如何在既减少仪器损坏又做好实验的前题下,尽可能地减少环境污染,则成为教师思考的课题。 相似文献
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Taking public transit facilities (PTFs) is the major transport style in Hang Kong. Human exposure to indoor air pollutants may cause adverse health effects to the passengers. Exposure assessment on air pollutants is important for the control of human diseases caused by indoor air pollution. In this paper, the indoor PM10,CO and C02 levels in various PTFs, such as public bus, subway, railway and ferry in Hong Kong, were measured. Combining with the time budget survey of Hong Kong population, the human exposures were calculated through Monte-Carlo simulation. 相似文献
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