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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.
削弱。。地上的望远镜要过时了
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
这题迷惑选项太多.
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！
有个困惑，E选项说了space telescope的局限性，即宇航员需要聚光更好的望远镜……问题是，题干中也没有任何一点提到group telescope有这个属性啊？
bcd都说地球可以弥补的地方，并没有说出绝对优势，不能证明无法被替代的结局。
同时比较两者的区别，才能cast the most soubt on the conclusion
如果之说一者，另一者同样可以更出色
advanced astronomical research purposes.
A：an orbiting space tele超支，不具有代表性，大部分的是否超支未知
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
A：an orbiting space tele超支，不具有代表性，大部分的是否超支未知
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
这个题是不是可以看做样本枚举？E说明了样本不具有代表性
这题几个选项真的都很有迷惑性了 希望老师讲一讲啊啊啊啊 A的问题在于只看了this year有很大局限性，b只说了可以避免一种distortion，c只是一种possibility，d 只是permit 依然不是最佳。。。同时cd里提到的都是large-aperture telescopes而不是ground-based telescopes。这样只剩下E。看起来最强烈。
B选项错误原因：要反驳gb tele并不distort，B说的是在某些特定方面gb tele并不distort，那其实还是distort的
而A选项只能对于短期内做出预测，无法长期
同时比较两者的区别，才能cast the most soubt on the conclusion
如果之说一者，另一者同样可以更出色
求解B为什么不对