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  3. Astronaut Jim Voss has enjoyed many memorable moments in his career, including three spaceflights and one space walk. But he rec

Astronaut Jim Voss has enjoyed many memorable moments in his career, including three spaceflights and one space walk. But he rec

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问题     Astronaut Jim Voss has enjoyed many memorable moments in his career, including three spaceflights and one space walk. But he recalls with special fondness a decidedly earthbound (为地球引力所束缚的) experience in the summer of 1980 when he participated in the NASA-ASEE Summer Faculty Fellowship Program. Voss, then a science teacher at West Point, was assigned to the Marshall Space Flight Center’s propulsion lab in Alabama to analyze why a hydraulic fuel pump seal on the space shuttle was working so well when previous seals had failed. It was a seemingly tiny problem among the vast complexities of running the space program. Yet it was important to NASA because any crack in the seal could have led to destructive results for the astronauts who relied on them.
     "I worked a bit with NASA engineers," says Voss, "but I did it mostly by analysis. I used a handheld calculator, not a computer, to do a thermodynamic(热力学的) analysis." At the end of the summer, he, like the other NASA-ASEE fellows working at Marshall, summarized his findings in a formal presentation and detailed paper. It was a valuable moment for Voss because the ASEE program gave him added understanding of NASA, deepened his desire to fly in space, and intensified his application for astronaut status.
    It was not an easy process. Voss was actually passed over when he first applied for the astronaut program in 1978. Over the next nine years he reapplied repeatedly, and was finally accepted in 1987. Since then he has participated in three space missions. The 50-year-old Army officer, who lives in Houston, is now in training for a four-month mission as a crew member on the International Space Station starting in July 2000.
    Voss says the ASEE program is wonderful for all involved. "It brings in people from the academic world and gives NASA a special property for a particular period of time. It brings some fresh eyes and fresh ideas to NASA, and establishes a link with our colleges and universities," Voss explains. "There’s an exchange of information and an exchange of perspectives that is very important."
    For the academic side, Voss says, "the ASEE program also brings institutions of higher learning more insight into new technology. We give them an opportunity to work on real world problems and take it back to the classroom."
选项 A、Because previous seals all failed.
B、Because it was very complex in running the space program.
C、Because great care has to be taken of the hydraulic fuel pump sealing.
D、Because any crack in the seals would cause disastrous results for the astronauts.
答案C
解析 细节题。题干意为“为什么液压燃料泵对航天飞机那么重要?”A的意思是“因为以前的密封圈都出厂问题”；B的意思是“因为在实施航天项目时它非常复杂”；C的意思是“因为必须十分注意液压燃料泵的密封性”；D的意思是“因为密封圈上的任何裂缝对宇航员都会带来灾难性的后果。”第一段最后一句的后半句为本题依据。原文中的destructive对应选项C中的disastrous。
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