题目内容

People diet to look more attractive. Fish diet to avoid being beaten up, thrown out of their social group, and getting eaten as a result. That is the fascinating conclusion of the latest research into fish behavior by a team of Australian scientists.

The research team have discovered that subordinate fish voluntarily diet to avoid challenging their larger competitors. “In studying gobies we noticed that only the largest two individuals, a male and female, had breeding (繁殖) rights within the group,” explains Marian Wong. “All other group members are nonbreeding females, each being 5-10% smaller than its next largest competitor. We wanted to find out how they maintain this precise size separation.”

The reason for the size difference was easy to see. Once a subordinate fish grows to within 5-10% of the size of its larger competitor, it causes a fight which usually ends in the smaller goby being driven away from the group. More often than not, the evicted fish is then eaten up.

It appeared that the smaller fish were keeping themselves small in order to avoid challenging the boss fish. Whether they did so voluntarily, by restraining how much they ate, was not clear. The research team decided to do an experiment. They tried to fatten up some of the subordinate gobies to see what happened. To their surprise, the gobies simply refused the extra food they were offered, clearly preferring to remain small and avoid fights, over having a feast.

The discovery challenges the traditional scientific view of how boss individuals keep their position in a group. Previously it was thought that large individuals simply used their weight and size to threaten their subordinates and take more of the food for themselves, so keeping their competitors small.

While the habits of gobies may seem a little mysterious, Dr. Wong explains that understanding the relationships between boss and subordinate animals is important to understanding how hierarchical (等级的) societies remain stable.

The research has proved the fact that voluntary dieting is a habit far from exclusive to humans. “As yet, we lack a complete understanding of how widespread the voluntary reduction of food intake is in nature,” the researchers comment. “Data on human dieting suggests that, while humans generally diet to improve health or increase attractiveness, rarely does it improve long-term health and males regularly prefer females that are fatter than the females’ own ideal.”

When a goby grows to within 5-10% of the size of its larger competitor, it        .

A. faces danger     B. has breeding rights

C. eats its competitor      D. leaves the group itself

The underlined words “the evicted fish” in Paragraph 3 refer to        .

A. the fish beaten up  B. the fish found out

C. the fish fattened up     D. the fish driven away

The experiment showed that the smaller fish        .

A. fought over a feast B. went on diet willingly

C. preferred some extra food    D. challenged the boss fish

What is the text mainly about?

A. Fish dieting and human dieting.

B. Dieting and health.

C. Human dieting.

D. Fish dieting.

【小题1】A

【小题2】D

【小题3】B

【小题4】D


解析:

【小题1】细节推断题。从第二段each being 5-10% smaller than its next largest competitor.可以判断出小于5 - 10%的未来最大的竞争对手。

【小题2】词义判断题。由上句it causes a fight which usually ends in the smaller goby being driven away from the group. More often than not,…可以推断出D的答案。

【小题3】细节判断题。从第三段最后一句话中可知道,拒绝供给他们额外的食物,而保持小,避免战斗。故选B。

【小题4】主题概括题。从文章中的一段和最后一段:研究已经证明了这一事实,节食是自愿的习惯远非人类。”

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C.flu can kill old people easily
D.flu is most common in summer
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C.people hate picking up dirty tissues
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C.Both colds and flu are caused by the same viruses.
D.Both colds and flu have an aching symptom.
【小题4】Which is probably the best title for the passage?
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A heart-warming story tells of a woman who finally decided to ask her boss for a raise in salary. All day she felt nervous and late in the afternoon she summoned the courage to approach her employer. To her delight, the boss agreed to a raise.                                                

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A.no love in the world is believable

B.love is one thing, and life is another

C.love in operas is truly touching

D.love can survive forever, though people die at different ages

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B.he has a great way to promote his wife’s love towards him

C.he had a false love for people even if the person is his wife

D.he loves his family members truly, whether they are in good conditions or not

3.From the text, we might say the author_____.

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Flu is much more serious illness and is caused by different group of viruses. People with flu usually get all the symptoms described above. However, they also get a high fever, a dry cough and much worse aching. Fever is one of the typical symptoms of the flu for all ages. The symptoms also last much longer. Sometimes they don’t disappear for at least two weeks.

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1. In paragraph 4, we learn that ______.

A.flu injection can cause death

B.most old people die from flu

C.flu is most common in summer

D.flu can kill old people easily

2.Dealing with used tissues properly is important because ______.

A.it helps keep your classroom tidy

B.people hate picking up dirty tissues

C.it prevents the spread of colds and flu

D.picking up lots of tissues is hard work

3.Which of the following statements is TRUE according to the passage?

A.Both colds and flu last the same time.

B.Both colds and flu can be prevented by injection.

C.Both colds and flu are caused by the same viruses.

D.Both colds and flu have an aching symptom.

4.Which is probably the best title for the passage?

A.Cold or Flu?

B.The Different Symptoms of a Cold and Flu

C.Prevention Is Better Than Cure

D.Cover Your Nose and Mouth When Sneezing

 

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