问答题

中国的载人空间工程项目按照“三步走”战略计划进行。第一步将中国宇航员送到太空，进行数天和数人太空飞行并安全返回预订位置。第二步将在进行太空舱外活动等关键技术上做出突破，将太空站送进太空，并进行短期载人空间应用试验。第三步将建立一个太空实验室，用于宇航员进行长期载人空间试验。

【参考答案】

正确答案：China"s manned space engineering project follows a "th......

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