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30. Robot satellites relay importantcommunications and identify weather patterns. Because the satellites can berepaired only in orbit, astronauts are needed to epair them. Without repairs,the satellites would eventually malfunction. Therefore, space flights carrying astronauts must continue. Which of the following, if true, would mostseriously weaken the argument above (A) Satellites falling from orbit becauseof malfunctions burn up in the atmosphere. (B) Although satellites are indispensablein the identification of weather patterns, weather forecasters also make some use of computer projectionsto identify weather patterns. (C) The government, responding to publicpressure,has decided to cut the budget for space flights and put more moneyinto social welfare programs. (D) Repair of satellites requires heavyequipment, which adds to the amount of fuel needed to lift a spaceship carryingastronauts into orbit. (E) Technical obsolescence of robotsatellites makes repairing them more costly and less practical than sendingnew, improved satellites into orbit.
纠结于B和E，最终还是选了B，为什么B不对E对呢？求解大家~
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发表于 2014-3-6 15:21:10
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