文[1]无疑是一节精彩的公开课.通过学生的自主学习、主动思考、合作交流、归纳总结,使学生对知识的发生、发展有了切身的感受和清晰的理解.学生成为课堂的主体,课堂成为师生交流的平台.但玉隐微瑕,琢更无价.1问题摘录原问题(问题1):一个靶子如图1所示,飞镖手随机地掷一个飞镖扎 Text [1] is undoubtedly a wonderful open class through the students’ autonomous learning, active thinking, cooperation and exchange, summarized, so that students have knowledge of the occurrence and development of personal experience and a clear understanding of the students into the classroom The subject, the classroom became a platform for teachers and students exchange .But Jade hidden micro defects, cut more priceless.1Express the original question (Question 1): a target shown in Figure 1, the dart hand randomly throwing a dart bar