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．”
1．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
2．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
3．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
4．What is the text mainly about?
A．Fish dieting and human dieting． B．Dieting and health．
C．Human dieting． D．Fish dieting．
ADBD
阅读理解E
Do you have a sore throat, a running nose and a headache? Do you keep coughing and sneezing? If you do, the chances are that you have a cold or perhaps flu---but which one? Although both colds and flu are caused by viruses, they are very different illnesses.
Colds, which usually last about a week, affect the nose most. They commonly cause a running nose and sneezing. Sometimes, they cause a headache, a cough and slightly aching muscles.
Flu is a much more serious illness and is caused by different groups of viruses. People with flu usually get all the symptoms(症状) described above. However, they also get a high fever, a dry cough and much worse aching. Fever is one of the characteristic symptoms of the flu for all ages. The symptoms also last much longer. Sometimes they don’t disappear for at least two weeks.
Flu can be a deadly disease. The elderly(年长的), who are weaker and less healthy than most younger people, can die from flu. This is one reason why old people are advised to have a flu injection(预防针) before the start of winter when flu is most common. This injection is inexpensive and definitely（明显地）worth it.
If you have a cold or flu, you must always deal with used tissues(手巾纸) carefully. Don’t leave dirty tissues on your desk or on the floor. Someone else has to pick these up and viruses could be passed on. And finally, remember to cover your nose and mouth when you sneeze! You don’t want to see the small drops of liquids blown(喷) out of your nose and mouth when you sneeze, do you? Disgusting(令人作呕), eh? Now you can understand why it’s a good idea to cover your nose and mouth when you sneeze!
【小题1】 In paragraph 4, we learn that ________.
| A．flu injection can cause death |
| B．most old people die from flu |
| C．flu can kill old people easily |
| D．flu is most common in summer |
| A．it helps keep your classroom tidy |
| B．it prevents the spread of colds and flu |
| C．people hate picking up dirty tissues |
| D．picking up lots of tissues is hard work |
| 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. |
| A．Colds and Flu |
| B．The Different Symptoms of a Cold and Flu |
| C．Prevention Is Better Than Cure |
| D．Cover Your Nose and Mouth When Sneezing |
Do you have a sore throat, a running nose and a headache? Do you keep coughing and sneezing? If you do, the chances are that you have a cold or perhaps flu--- but which one? Although both colds and flu are caused by viruses, they are very different illnesses.
Colds, which usually last about a week, affect the nose most. They commonly cause a runny nose and sneezing. Sometimes, they cause a headache, a cough and slightly aching muscles.
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.
Flu can be a deadly disease. The elderly, who are weaker and less healthy than most younger people, can die from flu. This is one reason why old people are advised to have a flu injection before the start of winter when flu is most common. This injection is inexpensive and definitely worth it.
If you have a cold or flu, you must always deal with used tissues carefully. Don’t leave dirty tissues on your desk or on the floor. Someone else has to pick these up and viruses could be passed on. And finally, remember to cover your nose and mouth when you sneeze！You don’t want to see the small drop of liquids blown out of your nose and mouth when you sneeze, do you? Disgusting, eh? Now you can understand why it’s a good idea to cover your nose and mouth when you sneeze!
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 |