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  3. The key to the industrialization of space is the U. S. space shuttle.【51】it,

The key to the industrialization of space is the U. S. space shuttle.【51】it,

游客2025-03-25  32
问题     The key to the industrialization of space is the U. S. space shuttle.【51】it, astronauts will acquire a workhouse vehicle【52】of flying into space and returning many times. 【53】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.【54】more significantly, it will deliver materials and machines into space for industrial purposes【55】two decades ago when "sputnik" (artificial satellite) was added to the vocabulary. In short, the【56】importance of the shuttle lies in its promise as an economic tool.
    What makes the space shuttle【57】is that it takes off like a rocket but lands like an air plane. 【58】when it has accomplished its mission, it can be ready for【59】trip in about two weeks.
    The space shuttle, the world’s first true spaceship, is a magnificent step【60】making the impossible possible for the benefit and survival of man. [br]
选项 A、Served
B、Powered
C、Forced
D、Reinforced
答案 B
解析 Served“由……提供服务”，Forced“被迫”，Reinforced“加强，加固”这三个词的意思放在句中都不合适，只有选Powered“由……提供动力”切题意，意即“航天飞机被火箭送上天空”。
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