[求助]OG11-1-6,非常感谢各位！

6. According to the passage, naked mole rat colonies may differ from all other known vertebrate groups in which of the following ways?
A.Naked mole rats exhibit an extreme form of altrusim.

1.第一段和第二段介绍的是similarity;
2.OG的解释和选项A的paraphrase有点矛盾；
3.C选项的解释有点牵强。

恳请牛人指点！

谢谢！！！

也被这题踢过

把原文都帖上来了-要用原文来定位

有人认为A对.我还是倾向选C:

与文章的主题相关:

这篇文章的第一题选C,注意C选项用了may,这与原文一致However, such a vertebrate society may exist among under-ground colonies of the highly social rodent Heterocephalus glaber, the naked mole rat.原文只是may,去掉may就不对了.

160. Which of the following most accurately states the main idea of the passage?
(A)  Naked mole rat colonies are the only known examples of cooperatively breeding vertebrate societies.
(B)  Naked mole rat colonies exhibit social organization based on a rigid caste system.
(C)  Behavior in naked mole rat colonies may well be a close vertebrate analogue to behavior in eusocial insect societies
(D)  The mating habits of naked mole rats differ from those of any other vertebrate species.
(E)  The basis for the division of labor among naked mole rats is the same as that among eusocial insects.

Until recently, scientists did not know of a close verte-

brate analogue to the extreme form of altruism abserved in

eusocial insects like ants and bees, whereby individuals

cooperate, sometimes even sacrificing their own oppor-

( 5) tunities to survive and reproduce, for the good of others.

However, such a vertebrate society may exist among under-

ground colonies of the highly social rodent Heterocephalus

glaber, the naked mole rat.

A naked mole rat colony, like a beehive, wasp’s nest, or

(10) termite mound, is ruled by its queen, or reproducing

female. Other adult female mole rats neither ovulate nor

breed. The queen of the largest member of the colony, and

she maintains her breeding status through a mixture of

behavioral and, presumably, chemical control. Queens have

(15) been long-lived in captivity, and when they die or are

removed from a colony one sees violent fighting for breed-

ing status among the larger remaining females, leading to a

takeover by a new queen.

Eusocial insect societies have rigid caste systems, each

(20)insects’s role being defined by its behavior,body shape, and

physiology. In naked mole rat societies, on the other hand,

differences in behavior are related primarily to reproductive

status (reproduction being limited to the queen and a few

males), body size, and perhaps age. Smaller nonbreeding

(25) members, both male and female, seem to participate pri-

marily in gathering food, transporting nest material, and

tunneling. Larger nonreaders are active in defending the

colony and perhaps in removing dirt from the tunnels.

Jarvis’ work has suggested that differences in growth rates

(30)may influence the length of time that an individual performs

a task, regardless of its age.

Cooperative breeding has evolved many times in verte-

brates, but unlike naked mole rats, most cooperatively

breeding vertebrates (except the wild dog, Lycaon pictus)

(35) are dominated by a pair of breeders rather than by a single

breeding female. The division of labor within social groups

is less pronounced among other vertebrates than among

naked mole rats, colony size is much smaller, and mating

by subordinate females may not be totally suppressed,

(40) whereas in naked mole rat colonies subordinate females are

not sexually active, and many never breed.

160. Which of the following most accurately states the main idea of the passage?

(A)  Naked mole rat colonies are the only known examples of cooperatively breeding vertebrate societies.

(B)  Naked mole rat colonies exhibit social organization based on a rigid caste system.

(C)  Behavior in naked mole rat colonies may well be a close vertebrate analogue to behavior in eusocial insect societies.

(D)  The mating habits of naked mole rats differ from those of any other vertebrate species.
   

(E)   The basis for the division of labor among naked mole rats is the same as that among eusocial insects.

161. The passage suggests that Jarvis’ work has called into question which of the following explanatory variables for naked mole rat behavior?

(A)  Size

(B)  Age

(C)  Reproductive status

(D)  Rate of growth

(E)   Previously exhibited behavior

165. According to the passage, naked mole rat colonies may differ from all other known vertebrate groups in which of the following ways?

(A)  Naked mole rats exhibit an extreme form of altruism.

(B)  Naked mole rats are cooperative breeders.

(C)  Among naked mole rats, many males are permitted to breed with a single dominant female.

(D)  Among naked mole rats, different tasks are performed at different times in an individual’s life 

(E)   Among naked mole rats, fighting results in the selection of a breeding female.

同意楼上。第六题是否可以这样理解呢。

exhibit an extreme form of altruism是NMR这个动物区别于其他脊椎类动物的最大不同(文章的主要主题！)。

Cooperative breeding has evolved many times in verte-

brates, but unlike naked mole rats, most cooperatively

breeding vertebrates (except the wild dog, Lycaon pictus)

(35) are dominated by a pair of breeders rather than by a single

breeding female.原文中的一句话，注意括弧里，wild dog 是single,和mole rat，一样，所以C排除了