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A project likely to evolve in. the near or intermediate future is space tour
A project likely to evolve in. the near or intermediate future is space tour
游客
2023-09-12
61
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问题
A project likely to evolve in. the near or intermediate future is space tourism, a purely【B1】______ activity that would not have to rely on unpredictable government decisions. It would 【B2】______ put space operations on a much more solid, dependable footing and would enormously【B3】______ man’s space activity. While some people see space tourism as a【B4】______ multibillion-dollar business, difficult technical problems remain to be【B5】______
First, a manned reusable rocket like the Venture Star must be built. Then, a second serious problem must be【B6】______ : even today’s most-advanced space rockets are able to【B7】______ only about 2.5% of their launch weight into orbit-- a ratio that has hardly changed in the last 40 years. This fact is a result of the【B8】______ of material characteristics and chemical power sources, and【B9】______ .
Today the price of a ticket to space would have to be at least $ 50 000. It is questionable【B10】______ . However, space tourism may become more attractive once space facilities are built【B11】______ . [br] 【B10】
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答案
whether a sufficient number of customers could be tempted to pay such a high price for a short trip around the world
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