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问大家一个GWD阅读

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楼主
发表于 2012-4-21 14:06:52 | 只看该作者 回帖奖励 |倒序浏览 |阅读模式
GWD 26-Q7 to Q9


There is no consensus among researchers

consensus among researchers
regarding what qualifies a substance as a

pheromone. While most agree on a basic definition

of pheromones as chemicals released by one

individual of a species which, when detected by

another individual of the same species, elicit a

specific behavioral or physiological response, some

researchers also specify (10) that the response to

pheromones must be unconscious. In addition, the

distinction between pheromones and odorants—

chemicals that are consciously detected as

odors---can be blurry, and some researchers

classify pheromones as a type of odorant. Evidence

that pheromone responses may not involve

conscious odor perception comes from the finding



that in many species, pheromones are processed by

the vomeronasal (or accessory olfactory) system,

which uses a special structure in the nose, the

vomeronasal organ (VNO), to receive chemical

signals. The neural connections between the VNO

and the brain are separate from those of the main

olfactory system, whose processing of odorants

triggers sensations of smell. But while the VNO

does process many animal pheromone signals, not

all animal pheromones work through the VNO.

Conversely, not all chemical signals transmitted via

the VNO quality as pheromones. For example,

garter snakes detect a chemical signal from

earthworms—one of their favorite foods—via the

VNO, and they use this signal to track their prey.

(行数可能有些不对,大家找的时候四周都看看就好了)
Q7 A

It can be inferred from the passage that in classifying pheromones as a type of odorant, the researchers referred to in line 15posit假定,认为that

A. pheromones are perceivedconsciously

B. most pheromones are processedby the VNO

C. most chemical signals processedby the VNO are pheromones

D. pheromone perception does notoccur exclusively between members of the same species.

E. pheromones do not always elicita specific behavioral or physiological response=

疑问:请问各位呀,哪里看出应该选A了?我怎么反而觉得文章中说的是unconsciously呢

Q9: The primary purpose of the passage is to E

A. compare and contrast the waysin which the vomeronasal organand the main olfactory systernprocess chemicals.

B. summarize the debate over therole the vomeronasal organ plays in odor perception

C. present some of the issuesinvolved in the debate overwhat constitutes a pheromone

D. ! propose a new definition ofpheromones based on recentresearch

E. argue that pheromones should beclassified as a type of odorant
疑问:这个问什么选E呢?




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沙发
 楼主| 发表于 2012-4-21 23:13:06 | 只看该作者
自己顶一下
板凳
发表于 2013-5-3 20:00:09 | 只看该作者
第七题,我是觉得那个“some researchers”是假定信息素和odorant都可以被清醒的闻到,所以才说信息素归类为一种有气味的物质
地板
发表于 2013-5-3 20:02:53 | 只看该作者
http://forum.chasedream.com/thread-386468-1-1.html
http://www.**.com/thread-394266-1-1.html
这里有解释
5#
发表于 2013-8-14 12:57:55 | 只看该作者
这题prep都说是c了
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