The key to the industrialization of space is the U. S. space shuttle.【C1】______it, astronauts will acquire a workhouse vehicle【C

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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.
【C7】

选项 A、exceptional
B、strange
C、unique
D、rare

答案C

解析 虽然四个词都有“与众不同,不一般;不普遍”等含义,但侧重点不同。exceptional强调“例外的;异常的,特别的”;strange意为“奇怪的,奇特的;过去没见过的”;rare指“不多见的,罕见的”。既能像火箭那样腾空而起,又能像飞机那样徐徐降落,这是航天飞机的独特之处,所以正确的选择是unique,作“独一无二的,独特的”讲。
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