100. 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 that it would be with a large truck approaching.
the conclusin above would be more properly drawn if it were made clear that the:
A truck's speed is assumed to be lower that 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.mostoris'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
答案是B可以理解，但是C为什么错，OG解释是if the truck is moving faster than the car,the illusion must make the two vehicles appear to be moving at the same speed.解释本身就已经违背了题目中的信息了，而且如果truck的速度比car快，而a small car approaching is bound to be lower ，那么不是正好证明了illusion的存在么。 | 
