题目

For any restaurant, a star from the famous company, Michelin(米其林)，is high praise for its food. Over the years, many expensive restaurants have won the stars. But this year, one star went to a small food stand named Liao Fan Hong Kong Soya Chicken Rice and Noodle(了凡香港油鸡饭面）The owner and chef(厨师) of Liao Fan is 51-year-old Chen Hanming. He cooks one of the most delicious dishes in the Chinatown of Singapore. With only two dollars, people can enjoy a plate of the Hong Kong-style chicken.Chen learned to cook soya sauce chicken 35 years ago from a Hong Kong chef. After 江Z民在中共十五大报告总结20世纪中国革命进程时说：“一个世纪以来，中国人民在前进的道路上经历了三次历史性的巨变，产生了三位站在时代前列的伟大人物：孙中山、毛.泽东、邓.小平。”请回答：（1）20世纪中国经历的三次历史性巨变分别是指什么？（2）与时俱进、理论创新是三位思想巨人的共同特点，试分别举例说明。