2. 外语
  3. At first, NASA is ______ private citizen’s space travel. NASA thinks space travellers must ______ to do private space travel

At first, NASA is ______ private citizen’s space travel. NASA thinks space travellers must ______ to do private space travel

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问题 At first, NASA is ______ private citizen’s space travel.
NASA thinks space travellers must ______ to do private space travel
选项 A、observe safety measures carefully
B、have a new desire to use space vehicles for civilian travel
C、nagotiate with Russia or NASA
D、be as rich as Dennis Tito and Mark Shuttleworth
答案A
解析 分析推理题。文章第四段首先通过专家的话解读了NASA新政策的意思，然后用该机构一位官员的话表明了NASA的态度．其中最后一句说：...as long as safety measures are observed carefully，表明了进行太空旅行的条件；严格遵守安全措施，故选[A]。
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