谈论太空探索与航天成就 — 英语词汇题

根据首字母及中文提示补全单词。1. Yang Liwei is the first Chinese a________（宇航员） to travel into space. 2. China has sent many r________（火箭） into s________（太空） in recent years. 3. Scientists are doing e________（实验） on the space station.