一、教学内容九年义务教材北师大版五年级下册88～89页。二、教材分析在信息技术不断发展的时代,人们常常需要在不确定的情况下,根据大量纷繁杂芜的数据做出一个合理的 First, the teaching content Nine years of compulsory teaching materials Beijing Normal University version of the fifth grade 88 ~ 89 pages. Second, the textbook analysis In the era of continuous development of information technology, people often need to be uncertain in the circumstances, according to a large number of complicated data to make a reasonable