Lance Bass wasn’t able to go on a tour of space because of health problems. [br]

游客2024-06-18  12

问题 Lance Bass wasn’t able to go on a tour of space because of health problems. [br] What makes going to space the most expensive vacation is the enormous cost involved in ______.

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答案 the fuel of spacecraft

解析 本题空白处问“使得太空旅行成为最昂贵旅行的是哪方面的巨大花销”。文中相关部分在第十四段,提到“太空飞船需要百万磅的燃料飞到太空,这使得发射非常昂贵”。因此,答案为the fuel of spacecraft。
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