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  3. The key to the industrialization of space is the U. S. space shuttle.【C1】___

The key to the industrialization of space is the U. S. space shuttle.【C1】___

游客2025-03-21  91
问题     The key to the industrialization of space is the U. S. space shuttle.【C1】______it, astronauts will acquire a workhouse vehicle【C2】______of flying into space and returning many times. 【C3】______by reusable rockets that can lift a load of 65 000 pounds, the shuttle will carry devices for scientific inquiry, as well as a variety of military hardware. 【C4】______more significantly, it will deliver materials and machines into space for industrial purposes【C5】______two decades ago when "sputnik" (artificial satellite) was added to the vocabulary. In short, the【C6】______importance of the shuttle lies in its promise as an economic tool.
    What makes the space shuttle【C7】______is that it takes off like a rocket but lands like an air-plane. 【C8】______when it has accomplished its mission, it can be ready for【C9】______trip in about two weeks.
    The space shuttle, the world’s first true spaceship, is a magnificent step【C10】______making the impossible possible for the benefit and survival of man. [br] 【C6】
选项 A、general
B、essential
C、prevailing
D、ultimate
答案 D
解析 本句的意思是：航天飞机最根本的重要性在于它能作为经济工具的前景。general表示“一般的；总的”，essential表示“基本的；最重要的”，prevailing表示“普遍的，流行的”，在这里都不合适。只有ultimate“终极的；根本的；最主要的”符合题意并能同importance搭配使用。
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