题目

It's not only rocket scientists and journalists who are following the course of ShenzhouV, or Divine ship/ vessel V. There are also lexicographers(字典编纂者 ), or dictionary compilers.The flight of the spacecraft recently might help put .some new words into orbit.      One of them is a western media coinage used to refer to the Chinese astronauts. It is a combination of the Chinese pinyin taikong, meaning space, and the English astronaut, from classical Greek: star sailor/navigator, for people who was going into space as a career.In the Reuters and AP reports of October 15, taikonaut空间三条直线中，任何两条不共面，且两两互相垂直，另一条直线与这三条直线所成的角均为，则        ．