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    8．Peyton，an 11-year-old boy from Florida，has the enthusiasm of scientific invention and the-gift of Thomas Edison．
    The sixth-grader put his math and science skills as well as some real-life experience to use and created something that could benefit our world a lot--the sandless sandbag．Today he was named the winner of the Young Scientist Challenge for his sandbag．
    "I had a really terrifying experience with a hurricane，"said Peyton．"When I was 4，I experienced Hurricane Wilma．When it hit Florida in October 2005，my family and I crowded in a closet and watched the storm bring damage and death to our area，feeling terrible and hopeless．"
    Saltwater flooding caused great damage，which made him think about how people can prepare for floods．Peyton，who has been solving math problems since he was 3，eventually came up with the sandless sandbag．   
    "Instead of filling it with sand，I filled it with just the right amount of chemicals and salt，"he said．"What's amazing is that when you pick these bags up and they're not wet，they only weigh a pound or two．"
    Unlike regular sandbags，Peyton's is light and easy to carry．They only expand when doused （浸泡）with water．The bags are portable when dry and will not float away when wet．
    Experts praised his invention and said that the sandless sandbag could someday save a lot of lives and possessions．"He understands the big picture．He thinks in terms of the influence on society and safety for the people around this area，"said Dr．Antonio，the engineering chairman at the University of Miami．"We'd love to have him at our university．"
    Peyton has to get through middle school and high school first，but until then，the young scientist will continue thinking and inventing．   
    46．Why did Peyton win the Young Scientist Challenge？D
    A．Because he is interested in scientific invention．
    B．Because he has the gift of Thomas Edison．
    C．Because he solved many maths problems．
    D．Because he invented the sandless sandbag．   
    47．What inspired Peyton to invent the sandless sandbag？A
    A．An experience in Hurricane Wilma．       
    B．Others'scientific invention．
    C．An idea of Thomas Edison．                   
    D．His maths and science skills．
    48．What makes Peyton's sandbag different from a regular one？B
    A．Outlook of the bags．                             
    B．Content of the bags．
    C．Material of the bags．                                
    D．Usage of the bags．
    49．when the sandless sandbag is wet，it willC．
    A．be portable    B．float away    C．get heavy  D．1ose weight
    50．We can infer from the passage thatD
    A．Peyton has been admitted into the University of Miami
    B．Peyton's sandbag has saved a lot of lives and possessions
    C．Peyton has drawn a big picture of his sandbag
    D．Peyton's sandbag could protect people from flooding better．

    分析 本文主要讲述了一个有着科学热情和爱迪生天赋的小男孩佩顿的故事，在六年级时就运用他的数学和科学技能创造出了对人类有重大意义的无砂沙袋，使人们能更方便的对抗洪水与飓风，他的发明同时获得了专家的称赞，被认为能挽救很多人的生命和财产，佩顿也会继续思考和发明更多东西．

    解答 46．D 细节理解题．Today he was named the winner of the Young Scientist Challenge for his sandbag．由第二段最后一句话可知佩顿是因为他发明的沙袋而获得了青年科学家挑战冠军．故选D
    47．A 细节理解题．由第三段佩顿说的话中可知，他小时候经历过飓风的威胁，差点失去生命，因此想到要发明无砂沙袋"I had a really terrifying experience with a hurricane，"said Peyton．"When I was 4，I experienced Hurricane Wilma．When it hit Florida in October 2005，my family and I crowded in a closet and watched the storm bring damage and death to our area，feeling terrible and hopeless．"故选A
    48．B 细节理解题．由第五段第一句可知Instead of filling it with sand，I filled it with just the right amount of chemicals and salt．佩顿的沙袋中所含的是化学物质和盐，而不是沙子，因此与普通沙袋的不同在于其内容物，故选B
    49．C 细节理解题．由第五段以及第六段可知佩顿的无砂沙袋在干燥的时候只重一磅或两磅，而遇水会膨胀变大，因此它湿了之后会变得更重．They only expand when doused with water．The bags are portable when dry and will not float away when wet．What's amazing is that when you pick these bags up and they're not wet，they only weigh a pound or two．"故选C
    50．D 理解推断题．仔细阅读文章可以发现佩顿发明的沙袋遇水会变重，因此可以阻挡洪水，故D正确．误解分析：由第六段最后一句the engineering chairman at the University of Miami．"We'd love to have him at our university"只是想要佩顿去他们大学而没有确定，因此选项A错误；Experts praised his invention and said that the sandless sandbag could someday save a lot of lives and possessions．由第六段，科学家说佩顿的无砂沙袋未来的摩天为挽救生命和财富是将来时，而现在没有发生，故选项B错误；佩顿并没有给他的沙袋计划一个好的未来，故选项C错误；故选D

    点评 考点：本文考察学生对记叙类阅读的理解，以及学生对文章细节的掌握和由文章所作出的推断，需要学生认真阅读后从原文寻找答案．

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