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题库 / OG2018V-CR-161
Which of the following most logically completes the argument?
A photograph of the night sky was taken with the camera shutter open for an extended period. The normal motion of stars across the sky caused the images of the stars in the photograph to appear as streaks. However, one bright spot was not streaked. Even if the spot were caused, as astronomers believe, by a celestial object, that object could still have been moving across the sky during the time the shutter was open, since ____________.
the spot was not the brightest object in the photograph
the photograph contains many streaks that astronomers can identify as caused by noncelestial objects
stars in the night sky do not appear to shift position relative to each other
the spot could have been caused by an object that emitted a flash that lasted for only a fraction of the time that the camera shutter was open
if the camera shutter had not been open for an extended period, it would have recorded substantially fewer celestial objects
照相的时候一个天体在移动-----也有条纹 削弱类比推理 给出这个天体和其他普通星星的区别
A 是不是最亮无关
B 没提到区别
C 没区别
D 因为在拍摄的时候它发光，所以导致没条纹，给出了区别
E 没提到区别
推理模式：我认为这题可以理解为类比推理，一是普通的星星，二是这个特殊的发光体，它们的共性是都在发光而且都在移动，但是为什么前者能被拍成一条轨迹，后者不能呢？所以现在只需要找不同就好：很显然D是说特殊发光体发光时间的短，那么我们可以大胆假设发光体就只闪一下然后就灭了，那样被拍下来肯定无法呈现出一条轨迹来。
推理模式：我认为这题可以理解为类比推理，一是普通的星星，二是这个特殊的发光体，它们的共性是都在发光而且都在移动，但是为什么前者能被拍成一条轨迹，后者不能呢？所以现在只需要找不同就好：很显然D是说特殊发光体发光时间的短，那么我们可以大胆假设发光体就只闪一下然后就灭了，那样被拍下来肯定无法呈现出一条轨迹来。
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