2. 外语
  3. Choose one appropriate word from the following word bank to fill in the blank numbered from 91 to 105 in the passage below. Chan

Choose one appropriate word from the following word bank to fill in the blank numbered from 91 to 105 in the passage below. Chan

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问题 Choose one appropriate word from the following word bank to fill in the blank numbered from 91 to 105 in the passage below. Change the word form where necessary. Remember the bank contains some extra words that may not be used in filling in any of the blanks. Write the words in their correct forms with the corresponding numbers on Answer Sheet(2).
inadequate        precious     for example     fund     program
auto-deployed     explorer     install         cost      robotic
unforseeable      require      picture         crew     launch
demonstrate       reason      flexibility      space     expensive
    Criticism of human space flight comes from many quarters. Some critics point to the high【W1】______of manned missions. They contend that the National Aeronautics and Space Administration has a full slate of tasks to accomplish and that human space flight is draining【W2】______from more important missions. Other critics question the scientific value of sending people into space. Their argument is that human space flight is a(n)【W3】______"stunt" and that scientific goals can be more easily and satisfactorily accomplished by【W4】______spacecraft.
    But the actual experience of astronauts and cosmonauts over the past 40 years has decisively shown the merits of people as【W5】______of space. Human capability is required in space to install and maintain complex scientific instruments and to conduct field exploration. These tasks take advantage of human【W6】______experience and judgment. They demand skills that are unlikely to be automated within the foreseeable future. A program of purely robotic exploration is【W7】______in addressing the important scientific issues that make the planets worthy of detailed study.
    Many of the scientific instruments sent into space【W8】______careful emplacement(放置)and alignment(排列)to work properly. Astronauts have successfully deployed instruments in Earth orbit and on the surface of Earth’s moon. In the case of the【W9】______telescope, the repair of the originally flawed instrument and its continued maintenance has been ably accomplished by space shuttle【W10】______on servicing missions. From 1969 to 1972 the Apollo astronauts carefully set up and aligned a variety of experiments on the lunar surface, which provided scientists with a detailed【W11】______of the moon’s interior by measuring seismic(地震的)activity and heat flow. These experiments operated flawlessly for eight years until shut down in 1977 for fiscal rather than technical【W12】______.
    Elaborate robotic techniques have been envisioned to allow the remote emplacement of instruments on planets or moons.【W13】______, surface rovers could conceivably install a network of seismic monitors. But these techniques have yet to be【W14】______in actual space operations. Very sensitive instruments cannot tolerate the rough handling of robotics deployment. Thus, the【W15】______versions of such networks would very likely have lower sensitivity and capability than their human-deployed counterparts do.
【W10】
选项
答案crews
解析 能够完成servicing missions的只能是“航天飞机机组人员”，由于missions为复数，crew也用复数形式，与上下文的astronauts照应。故答案为Crews。
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