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 本文主要講述了一個有著科學熱情和愛迪生天賦的小男孩佩頓的故事，在六年級時就運用他的數(shù)學和科學技能創(chuàng)造出了對人類有重大意義的無砂沙袋，使人們能更方便的對抗洪水與颶風，他的發(fā)明同時獲得了專家的稱贊，被認為能挽救很多人的生命和財產，佩頓也會繼續(xù)思考和發(fā)明更多東西．

解答 46．D 細節(jié)理解題．Today he was named the winner of the Young Scientist Challenge for his sandbag．由第二段最后一句話可知佩頓是因為他發(fā)明的沙袋而獲得了青年科學家挑戰(zhàn)冠軍．故選D
47．A 細節(jié)理解題．由第三段佩頓說的話中可知，他小時候經歷過颶風的威脅，差點失去生命，因此想到要發(fā)明無砂沙袋"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．"故選A
48．B 細節(jié)理解題．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．佩頓的沙袋中所含的是化學物質和鹽，而不是沙子，因此與普通沙袋的不同在于其內容物，故選B
49．C 細節(jié)理解題．由第五段以及第六段可知佩頓的無砂沙袋在干燥的時候只重一磅或兩磅，而遇水會膨脹變大，因此它濕了之后會變得更重．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．"故選C
50．D 理解推斷題．仔細閱讀文章可以發(fā)現(xiàn)佩頓發(fā)明的沙袋遇水會變重，因此可以阻擋洪水，故D正確．誤解分析：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"只是想要佩頓去他們大學而沒有確定，因此選項A錯誤；Experts praised his invention and said that the sandless sandbag could someday save a lot of lives and possessions．由第六段，科學家說佩頓的無砂沙袋未來的摩天為挽救生命和財富是將來時，而現(xiàn)在沒有發(fā)生，故選項B錯誤；佩頓并沒有給他的沙袋計劃一個好的未來，故選項C錯誤；故選D

點評 考點：本文考察學生對記敘類閱讀的理解，以及學生對文章細節(jié)的掌握和由文章所作出的推斷，需要學生認真閱讀后從原文尋找答案．

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