1961年,加加林乘坐宇宙飞船,第一次遨游了太空,为载人航天活动创造了一系列的辉煌成就。但成就后面,也经历了多次严重的挫折,付出了昂贵的代价。这些都表明,载人航天是一项非常艰巨、极端复杂而且充满风险的事业。这些会不会影响人类进军太空的步伐呢?事实表明,不会的。美国、俄罗斯、欧空局、日本、加拿大、巴西等16个国家正在建设国际空间站,并且已经载人飞行;我国也即将发射 In 1961, Gagarin took spacecraft for the first time to travel in space and created a series of brilliant achievements for manned space activities. However, behind the achievement, he also experienced many serious setbacks and paid a high price. All these indicate that manned space flight is a very arduous, extremely complex and risky undertaking. Will this affect the pace of man’s advance into space? The facts show that it will not. Sixteen countries, including the United States, Russia, European Space Agency, Japan, Canada, and Brazil, are building the International Space Station and have already carried manned flights;