标题: OG一个题，大神求问 [打印本页] 作者: 小仙女rachel 时间: 2017-9-7 14:50 标题: OG一个题，大神求问 A compelling optical illusion called the illusion of velocity and size makes objects appear to be moving more slowly the larger the objects are. Therefore, a motorist’s estimate of the time available for crossing a highway with a small car approaching is bound to be lower than it would be with a large truck approaching.
The conclusion above would be more properly drawn if it were made clear that the (assumption)
(A) truck’s speed is assumed to be lower than the car’s
(B) truck’s speed is assumed to be the same as the car’s
(C) truck’s speed is assumed to be higher than the car’s
(D) motorist’s estimate of time available is assumed to be more accurate with cars approaching than with trucks approaching
(E) motorist’s estimate of time available is assumed to be more accurate with trucks approaching than with cars approaching
请问这句话结论是什么意思
A compelling optical illusion called the illusion of velocity and size makes objects appear to be moving more slowly the larger the objects are. （这句是省略句，回过来是：A compelling optical illusion called the illusion of velocity and size makes objects appear to be moving more slowly, the larger the objects, the more slowly moving the objects are appeared to be.)Therefore, a motorist's estimate of the time available for crossing a highway with a small car approaching is bound to be lower than that it would be with a large truck approaching.
题干：一种强制性的视觉误差叫做速度和大小产生的误差：越大的物体看上去越慢。
A. truck's speed is assumed to be lower than the car's （同样的速度条件下，我们才能比较误差，如果不是同一个参数级别，不能得出结论）
B.truck's speed is assumed to be the same as the car's (在卡车和小车原来速度相同的情况下，我们才能比较视觉差的问题，如果他们速度本来就不一样，有快慢，题目的结论就无法成立，我们不知道小车原来就比卡车快，还是反之，这样自然影响判断他们的能穿过高速的时间）
C.truck's speed is assumed to be higher than the car's （理由同上）
D.mostoris's estimate of time available is assumed to be more accurate with cars approaching than with trucks approaching （本题说的是视觉对速度的判断误差和物体大小有关，视觉误差是一直存在的，不存在哪个更精确的问题。比如：你对物体的速度产生的视觉误差是固定的，不因为你看见一辆大车，你的视觉误差率大，而小车就误差率小）
E.motorist's estimate of time available is assumed to be more accurate with trucks approaching than with cars approaching （理由同上）