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为什么说SpaceX首次载人飞行发射具有历史意义？
source link: https://tech.sina.com.cn/d/s/2020-05-31/doc-iircuyvi5906811.shtml
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新浪科技讯北京时间5月31日消息，据国外媒体报道，北京时间5月31日凌晨3点22分，美国SpaceX公司首次利用载人龙飞船携载宇航员鲍勃·贝恩肯（BobBehnken）和道格·赫尔利（DougHurley）顺利升空。预计19小时之后，北京时
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