榜样力量

重庆市初一学生吴香林父母离异，继父在外打工。14岁的她一个人照顾年老的外公外婆，生病的妈妈和年幼的弟弟。她每天早上4点多就要起床，料理完家务，又要带弟弟急急赶往学校。学校离家10多公里，但为了照顾家，她每天往返3个多小时。课余时间，她还要做农活。夜晚，吴林香要起床照顾因病痛难眠的妈妈，不管春夏秋冬，这个女孩从没睡过一个安稳觉。 “吴林香是一个非常坚强的学生。”班主任老师称。在学校，吴林香成绩一直名列前茅。吴林香的事迹已被《重庆日报》、中央广播电台等多家媒体报道，并当选为第四届全国道德模范。

阅读上述材料，结合所学知识，回答下列问题。

连线：

问鼎中原____              春秋首霸

卧薪尝胆____              晋楚争霸

尊王攘夷____              春秋战国

百家争鸣____              孔子

因材施教____              吴越争霸

在样本的频率分布直方图中，共有9个小长方形，若第一个长方形的面积为0.02，前五个与后五个长方形的面积分别成等差数列且公差是互为相反数，若样本容量为1600，则中间一组（即第五组）的频数为____

   It began with one red paper clip(回形针)and ended with a house. Kyle MacDonald, a 26-year-old Canadian got a house with three bedrooms through 14 trades(交易)that started with a single red paper clip.
   Now more and more young people around the world like this kind of trading activities. They set up websites and trade on the Internet. People trade things they do not usually use with other people. A website called Peerflix allows people to trade their old possessions. These traders usually prefer face-to-face trading, in this way they don't have to worry about who is going to pay for the delivery(递送).
   Last year, a young girl in Beijing decided to follow the example of Kyle. She started with a paper clip and hoped to get a house in the end．After several trades she now has a piano which is worth more than 10, 000 yuan. But she may still have a long way to go.
   Maybe you can't understand why people are doing this. As Kyle said, "What's more important to a man in the desert—one million dollars or a glass of water?" Kyle's words probably show why these trades are popular among young people.