题目

Jean Driscoll can go faster in her wheelchair than the world’s best marathoners(马拉松运动员) can run!     In April, Jean finished the Boston Marathon in 1 hour 34 minutes 22 seconds. That’s about 33 minutes faster than the winning male runner! She competed on the track, too. She was second in the 800 meter wheelchair race at the 1992 Olympics.     Jean doesn’t like to be told she’s brave. “I’m in sports because I’m a competitive person!” Jean was born with spina befida(脊柱裂), a birth illness that damages the spine（脊椎）. She began to use a wheelch16．在雄壮的国歌声中升旗手将重5N的国旗升到旗杆顶端，他对国旗做功的功率最接近于（　　）A．10WB．0.1WC．1WD．100W