题干

根据定义写单词
【小题1】a person who travels to space to carry out scientific research ________
【小题2】a spacecraft which is used to travel to space ________
【小题3】a base which is used to do research in outer space ________
【小题4】the act of moving around outside a spacecraft while in space ________
【小题5】equipment used in outer space to protect astronauts and provide oxygen ________
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