题目

Eileen Collins is the first woman ever chosen to be a spaceship pilot. She is also the first woman to command (指挥) a spaceship. Today she has flown more than 5, 000 hours in more than 30 kinds of airplanes. Talking about high school, she said, “I began reading all kinds of books about famous women pilots. These women went and flew into dangerous places. Their stories encouraged me.” In 1977 Eileen got a pilot’s license and the following year she graduated(毕业) from university. She went into space in 1999 at the age of 43. She took with her the hopes and dreams of a nation of youn若是展开式中项的系数，则         ．