2. 考研
  3. The world lost seven astronauts of Space Shuttle Columbia (哥伦比亚号航天飞机) this month. It brought home the serious risk that humans

The world lost seven astronauts of Space Shuttle Columbia (哥伦比亚号航天飞机) this month. It brought home the serious risk that humans

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问题     The world lost seven astronauts of Space Shuttle Columbia (哥伦比亚号航天飞机) this month.  It brought home the serious risk that humans face into the hostile environs beyond our【C1】________planets, raising the question of whether exploring the heavens should be left to unmanned missions.
    【C2】________less exciting,  such missions will pose no risks to humans.   And already robots have an impressive list of accomplishments 【C3】________ to their flesh and blood counterparts (职级地位相当的人或物).
    "Unmanned missions are all about specifically targeted scientific【C4】________of the universe around us. Without exceptions, these efforts rise out of intense competition where the most compelling, and answerable questions are【C5】________, " said Marc Buie, an astronomer (天文学家) at Lowell     Observatory in Flagstaff, Arizona. Robots have dug in the dirt on Mars,  flown in the【C6】________ of Jupiter(木星), and driven by the moons of Neptune.     A few are even approaching the boundary of the【C7】________.
    Humans, on the other hand, have mostly been going in circles, 【C8】________above the surface of the planet. Besides the brief Apollo Mission triumphs on the【C9】________almost 250,000 miles away, humans have never gone farther than 400, 000 miles from the planet, less than a day’ s drive, although straight up. Humans fly near home for several reasons. There is the logistics (后勤) of sending humans and what they need, like water, air and food, in a closed environment that keeps them【C10】________.
【C8】
选项 A、seldom
B、never
C、barely
D、almost
答案C
解析 本句句意是：在另一方面，人类大多________绕着位于地球上空的圆形轨道行进。人类的太空活动与机器人形成鲜明对比，前者比后者活动范围窄得多，只在地球附近徘徊，C选项barely“仅仅”符合上下文逻辑关系和现实状况，故选C。
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