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一、教材问题呈现人教版《义务教育课程标准教科书·数学》八年级上册“12.2.1作轴对称图形”的第二节课安排了一个探究问题:如图1,要在燃气管道l上修建一个泵站,分别向A、B两镇供气,
First, the teaching material issue person PEP “compulsory education curriculum standards textbooks mathematics” eighth grade book “12.2.1 for axial symmetry graphics ” the second lesson arranges an inquiry question: Figure 1, to be in the gas pipeline l Build a pump station and supply gas to towns A and B respectively.