载人航天是处在高科技的前沿阵地,有许多不确定的因素难以预见。从技术上讲,任何一种开创性的构思、设计和实施都具有一定的风险性,企望百分之百的成功是不切实际的。因此,高科技的发展往往不能不和大量的失败相伴随。而举世瞩目的载人航天技术的发展,表现得尤为突出。一、载人航天的风险人从地球飞往太空,再从太空返回地 Manned space is at the cutting edge of high technology, with many uncertainties unpredictable. Technically, any groundbreaking idea, design and implementation has a certain degree of risk, expecting 100% success is impractical. Therefore, the development of high technology often can not but accompanied by a large number of failures. The development of manned spacecraft, which has attracted worldwide attention, has been particularly outstanding. First, the risk of manned space flight from Earth to space, and then returned from space