GMAT准备看OG时遇到逻辑CR不会,
Robot satellites relay important
communications and identify weather patterns.Because the satellites can be
repaired only in orbit,astronauts are needed to repair 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 indispensable
in the identification of weather patterns,weather forecasters also make some
use of computer projections to identify weather patterns.
(C) The government,responding to public
pressure,has decided to cut the budget for space flights and put more money
into social welfare programs.
(D) Repair of satellites requires heavy
equipment,which adds to the amount of fuel needed to lift a spaceship carrying
astronauts into orbit.
答案
人造卫星只有在轨道上才能被维修,所以要求宇航员去维修.不修的话就会失常.因此要继续用飞船运送宇航员.
原文中维修就是隐形的钱,这是成本.A说卫星掉落在大气层会燃烧,这说明不了任何问题.
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