请教一道Must Be True 题， 已然乱了……

maannadana

Light is registered in the retina when photons hit molecules of the pigment rhodopsin and change the molecules' shape. Even when they have not been struck by photons of light, rhodopsin molecules sometimes change shape because of normal molecular motion, thereby introducing error into the visual system. The amount of this molecular motion is directly pproportional to the temperature of the retina.

which one of the following conclusions is most strongly supported by the information above?

(A) The temperature of an animal's retina depends on the amount of light the retina is absorbing.
(B) The visual systems of animals whose body temperature matches that of their surroundings are more error-prone in hot surroundings than in cold ones.
(C) As the temperature of the retina rises, rhodopsin molecules react more slowly to being struck by photons.
(D)Rhodopsin molecules are more sensitive to photons in animals whose retinas have larege surface areas than in animals whose retinas have small surface areas.

zhouliang0123

佩服！

maannadana

非常感谢~~

maannadana

非常感谢！明白了

lijiazhou

还是大牛厉害！忽略了里面的成比例这个问题，楼主看sdcar大牛的哈，我的忽略！！！

Must be true question is the easiest of all.

In this case, a list of facts are provided and you are asked to find one answer choice which is supported by those facts.

What you need to do is to understand all the facts.
1) When light hits the molecule R, R changes its shape.
2) When R changes its shape, light is registered in retina (meaning the eye sees light).
3) Normal molecular motion of R also changes R's shape (thus causes error for the eye to recognize light since light does not hit molecule R).
4) The higher the temperature, the more molecular motion.

B) is right since it could be decuced from the combination of facts 3) and 4), together with the trigger in B).

-- by 会员 sdcar2010 (2012/4/6 23:55:48)

sdcar2010

Must be true question is the easiest of all.

In this case, a list of facts are provided and you are asked to find one answer choice which is supported by those facts.

What you need to do is to understand all the facts.
1) When light hits the molecule R, R changes its shape.
2) When R changes its shape, light is registered in retina (meaning the eye sees light).
3) Normal molecular motion of R also changes R's shape (thus causes error for the eye to recognize light since light does not hit molecule R).
4) The higher the temperature, the more molecular motion.

B) is right since it could be decuced from the combination of facts 3) and 4), together with the trigger in B).

maannadana

问题是文章support下面哪个选项……

lijiazhou

楼主要注意问题啊，问题是选项中哪一个是对文章的support哦，既然B中由于温度越高motion越大，误差也越大，是不是就是说明motion会引起误差的情况啊

但是题中也没用说温度越高或越低motion会怎样啊

-- by 会员 maannadana (2012/4/6 17:52:14)

maannadana

但是题中也没用说温度越高或越低motion会怎样啊

maannadana

是选B的，太厉害了