Q7 to Q9

There is no consensus among

researchers regarding what qualifies a

substance as a pheromone. While most

Line agree on a basic definition of pheromones

(5) 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

(15) 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

(20) 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

(25) 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 phero-

(30) mones 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

(35) the VNO, and they use this signal to track

their prey.

E跟文章主题反的. 只能选C

(20) by the vomeronasal (or accessory olfactory)    系统负责处理。

    system, which uses a special structure in

the nose, the vomeronasal organ (VNO),

to receive chemical signals. The neural        犁骨组织和大脑的神经连接是

connections between the VNO and the        和嗅觉系统与大脑的神经连接

(25) brain are separate from those of the main      分离的，而所有的气味感觉都

olfactory system, whose processing of        是由嗅觉系统处理。

odorants triggers sensations of smell. But      （转折，对比）

while the VNO does process many animal     但当犁骨组织处理动物信息素

pheromone signals, not all animal phero-      信号时，并非所有的信息素都

(30) mones work through the VNO. Conversely,    （反例）

not all chemical signals transmitted via the     由犁骨组织处理。相反，并非

VNO quality as pheromones. For example,     所有的通过犁骨组织传输的化

garter snakes detect a chemical signal from     学信号都是信息素。譬如：G

earthworms—one of their favorite foods—via   蛇通过犁骨组织检测地虫释

(35) the VNO, and they use this signal to track      放的化学信号，并且使用这些

their prey.                                                    信号追踪猎物。

翻译了一下，但是发现没有那个选项能够很好的概括文章。很明显C的constitutes完全不属于文章讨论内容，我选了D，但是我更加认为E选项漏了“not”，argue that pheromones should not be classified as a type of odorant。因为文章说了未有一致定义，接着说原有定义和实际发现不统一，正篇都是说明目前的定义和实际情况不吻合。