President Barack Obama rode a bicycle at the White House Science Fair on April 22. But it wasn’t an ordinary bike. As he pedaled, the President stayed in place, while the energy from his pedaling powered a water filtration (过滤) system. He was testing an invention created by a team of 14 students from Northeast High School, in Oakland Park, Florida.
Payton Karr, 16, and Kiona Elliot, 18, attended the fair as representatives of the project.“We were hoping President Obama would ride the bike, but we didn’t actually expect him to,” Payton told TFK. “ It really meant a lot.” Kiona agreed. “It was pretty awesome to see the invention, which was invented by a group of 14 high school students and one teacher, along with the help of munity members, got the interest of the leader of our nation,” she said.
The project was an idea that came about after one of the Northeast students, Kalie Hoke, visited Haiti after the terrible 2010 earthquake and saw how difficult it was to find clean water. The students invented a portable(便携的), bicycle-powered emergency water filtration system, which can provide 20-30 people with drinking water in a 15-hour period. The teens hope their invention will one day be used by relief organizations like the Red Cross. “ They can take it to places after natural disasters so that water can be clean for the people there,” said Payton.
Payton and Kiona were among the 100 students from more than 40 states invited to the third annual White House Science Fair, in Washington, D.C., which is also attended by leaders in science and education. President Obama started the event in 2010 to stimulate students interested in STEM (Science, Technology, Engineering, Maths).“Well, if you’re a young person and you produce the best experiment or design, you ought to be recognized for that achievement,” Obama said when he first announced the fair.
President Obama praised the projects during a speech to attendees after the fair. “The science fair projects of today could bee the products and businesses of tomorrow,” he said. “If you’re inventing things in the third grade, what are you going to do by the time you get to college?”
【小题1】What is special about the bicycle President Obama rode?A．It can move very fast.B．It is extremely beautiful.C．It is used to make water clean.D．It is made of eco-friendly materials.【小题2】The representatives of the bicycle-powered water filtration system .A．were both munity membersB．graduated from a famous universityC．finished the project with the help of their parentsD．were surprised that their invention interested Obama【小题3】The bicycle-powered water filtration system was designed .A．at the request of the Red CrossB．for city families to get pure waterC．during the terrible 2010 earthquake in HaitiD．to provide people in disaster areas with clean water【小题4】The underlined word “stimulate” in Paragraph 4 can be replaced by .A．helpB．inspireC．changeD．entertain【小题5】We can know from the last sentence in the passage that President Obama .A．wanted the youth to have big dreamsB．encouraged the youth to go to collegeC．worried the young inventors would do nothing in collegeD．believed the young inventors would have a promising futureC
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(答案→)C
解析：奥巴马总统在白宫试验了一种以骑自行车为动力的水源净化装置，而该装置的发明人竟是还在上学的一群孩子。在经历了2010年的一场地震后，他们想要像红十字会一样帮助别人，于是设计发明了这个装置。
【小题1】细节理解题。由“As he pedaled, the President stayed in place, while the energy from his pedaling powered a water filtration (过滤) system.（总统亲自蹬自行车试验通过蹬自行车产生的能量可以用来给过滤水的系统充电。） ”可知，该装置是用来净化水的。 故选C。
【小题2】细节理解题。由““It was pretty awesome to see the invention, which was invented by a group of 14 high school students and one teacher, along with the help of munity members, got the interest of the leader of our nation,” she said.”可知，当他们获知自己代表小组去白宫时感到很吃惊。故选D。
【小题3】细节理解题。由“They can take it to places after natural disasters so that water can be clean for the people there”可知该装置的目的是为了给灾区的人提供洁净的水。故选D。
【小题4】词义猜测题。help帮助；inspire鼓励；change改变；entertain娱乐。由文章可知奥巴马总统是在鼓励同学们。故选B。
【小题5】推理判断题。奥巴马总统认为人们的一点小的发明创意也许就会变成大产业，所以他相信年轻的创业者会有美好的前途。故选D。