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题库 / OG2017V-CR-173
Images from ground-based telescopes are invariably distorted by the Earth's atmosphere. Orbiting space telescopes, however, operating above Earth's atmosphere, should provide superbly detailed images. Therefore, ground-based telescopes will soon become obsolete for advanced astronomical research purposes.
Which of the following statements, if true, would cast the most doubt on the conclusion drawn above?
An orbiting space telescope due to be launched this year is far behind schedule and over budget, whereas the largest ground-based telescope was both within budget and on schedule.
Ground-based telescopes located on mountain summits are not subject to the kinds of atmospheric distortion which, at low altitudes, make stars appear to twinkle.
By careful choice of observatory location, it is possible for largeaperture telescopes to avoid most of the kind of wind turbulence that can distort image quality.
When large-aperture telescopes are located at high altitudes near the equator, they permit the best Earth-based observations of the center of the Milky Way Galaxy, a prime target of astronomical research.
Detailed spectral analyses, upon which astronomers rely for determining the chemical composition and evolutionary history of stars, require telescopes with more light-gathering capacity than space telescopes can provide.
A 这和以后是不是要过时了无关
BCD 都在讲地面望远镜可以克服它的缺点，但从没有提到太空望远镜。可能太空望远镜比地面更先进
E 讲了地面望远镜与太空望远镜对比 太空望远镜的劣势，说明地面还是有用 选最优的答案
A 个例orbiting telescope的问题无法说明什么，且cost和schedule不是mainpoint，主要是research value
B未受到一种distortion，which限定修饰一种distortion
C能避免wind turbulence，并不能代表其他distortion不会发生
D注意earth based，说明在地球上，这种telescope可以提供最好的观察，space telescope可能更好
E只有E说明了space telescope的缺点，虽然没有对比earth telescope，但对比其他选项，这是最好的！
如果之说一者，另一者同样可以更出色
B：ground 望远镜自己的比较（在山顶图像歪曲的少) 但是题目是通过 orbing望远镜和ground望远镜对比得出结论，这不是一个维度，无关
B：ground 望远镜自己的比较（在山顶图像歪曲的少) 但是题目是通过 orbing望远镜和ground望远镜对比得出结论，这不是一个维度，无关
如果之说一者，另一者同样可以更出色