活动流程                                                                                                                                                                                                                                 导航台                                                                                                                                                                                 菜单栏                                                                                                                                                                                                                                                                                                                                      

【基础知识梳理】                                                                                                                                                                                                                             【自学小提示】                                                                                                                                                                             画“知识树”法就是用树形结构来表述一门学科知识的结构和知识梳理的一种方法。