目前各地学校都强调素质教育．不但课本上有一节“安全用电”，而且为培养学生的动手能力还专门开设了“照明电路”劳技课．为了提高学生们的素质而又绝对保证学生的用电安全，教师必须更多地对安全电压知识有全面的认识．安全电压是指人体较长时间接触而不致发生触电危险... At present, schools everywhere emphasize quality education. Not only does the textbook have a section on “safety use of electricity”, but also a “lighting circuit” labor and technology section has been established to cultivate students’ practical ability. In order to improve the quality of students and absolutely guarantee the safety of students’ electricity, teachers must have more comprehensive knowledge of safe voltage knowledge. Safe voltage means that the human body is exposed for a long time without risk of electric shock...