“Who needs a shopping mall if you have Taobao?" says Wang Lin, 28, a writer in Beijing. Taobao, China's largest online shopping site(网上购物网站), has become an important part of Wang Lin's life. She spends lots of money on Taobao.A growing number of Chinese Internet users like Wang have found the joys of online shopping =. Most online shoppers are students or young workers. More women shop on line than men. Clothing and home-use products（产品）are the most popular on line.
   It was reported that more than 250 billion（十亿）yuan was spent on online shopping last year, 80% through Taobao.Taobao means “looking for treasure” in Chinese. People can find almost everything they need on Taobao, from clothes to books =, from candies to DVD players .
   You may question the security of online shopping, Wang Lin said, "It's very safe and convenient. Unless you receive the products from the sellers and are satisfied with them, the shop owner will not get the money .You can also get your money back if you want to return the products.”

通过实验的方法用频率估计概率的大小，必须要求实验在____ 的条件下进行．

阅读材料，完成下列探究性学习任务。
材料一 对德国来说，拿破仑并不像他的敌人所说的那样是一个专横跋扈的暴君。他在德国是革命的代表，是革命原理的传播者，是旧的封建社会的摧毁人。
——恩格斯《德国状况》
材料二 华盛顿有所为，美利坚民族得以独立；华盛顿有所不为，美利坚人民不受其害。
——易中天著《美国宪法的诞生和我们的反思》
材料三

材料四  1796年华盛顿发表《告别词》：“我现在应当向大家有所表示……就是我已下决心谢绝把我放在被选之列。”从而主动放弃了就继承当选美国总统的权利。
（1）以上材料一，材料二立足的基本史实是什么？
（2）结合上述材料和所学知识概括华盛顿与拿破仑一生中最主要的贡献？
（3）从人类社会的发展进程来看，华盛顿与拿破仑对人类社会发展进程都起到什么积极作用？
（4）比较材料三材料四说一说华盛顿与拿破仑不同之处是什么，你更欣赏谁的做法？
（5）你认为如何正确评价历史人物？