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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 non-breeding 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 （等級(jí)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
A
．
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
D
D
．
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
B
B
．
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？
D
D

A．Fish dieting and human dieting．
B．Dieting and health．
C．Human dieting．
D．Fish dieting．

【考點(diǎn)】說(shuō)明文；議論文．

【答案】A；D；B；D

【解答】

【點(diǎn)評(píng)】

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發(fā)布：2024/5/27 14:0:0組卷：17引用：2難度：0.5

相似題

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Malaria starts suddenly，with violent chills，which are soon followed by an intense （強(qiáng)烈的）fever and，often，headaches.As the parasites multiply（增加），they take over the entire body.Malaria parasites live by eating the red blood cells they infect （感染）.They can also go into blood vessels in the brain.If it doesn't kill you，malaria can happen again and again for years.The disease passed on to humans by female mosquitoes（蚊子） infected with one of four species of parasite.Together，the mosquito and the parasite are the most dangerous couple in the history of the earth.Malaria has five thousand genes，and its ability to change rapidly to protect itself from attack and resist（抵抗） new drugs has made it nearly impossible to control.Studies show that mosquitoes are passing on the virus more frequently，and there are more outbreaks in cities with large populations.Some of the disease's spread is due to global warming.
For decades，the first-choice treatment for malaria parasites in Africa has been chloroquine，a chemical which is very cheap and easy to make.Unfortunately，in most parts of the world，malaria parasites have become resistant to it.Effective medicines that help prevent resistance are already available，but they have been in short supply and are very expensive.If these drugs should fail，nobody knows what would come next.

（1）According to paragraph 1，many people don't search for care because

.
A．they are too poor
B．it is unusual to seek care
C．they can remain unaffected for long
D．there are too many people suffering from the disease
（2）People suffering from malaria

.
A．have to kill female mosquitoes
B．have their red blood cells infected
C．have ability to defend parasites
D．have sudden fever，followed by chills
（3）Which of the following may be the reason for the wide spread of the disease？

A．Its resistance to global warming.
B．Its ability to pass on the virus frequently.
C．Its ability to protect itself from attack and resist new drugs.
D．Its outbreaks in cities with large populations.
（4）It can be inferred from the passage that

.
A．the effective drugs are not easily available to most people
B．no drugs have been found to treat the disease
C．malaria has developed its ability to resist parasites
D．nobody knows what will be the drug to treat the disease
發(fā)布：2024/11/17 10:0:3組卷：2引用：1難度：0.6
解析
2．The coronavirus（冠狀病毒）outbreak has sparked panic buying of toilet paper and cleaning products in countries across the world，but one UK businessman is determined to spread some happiness among the anxiety and confusion．
   Rob Braddick，48，who owns Braddick's Holiday Park in Westward Ho，Devon，in the southwest of England，has filled the toy grabber machines in his amusement park with two of the country's most sought-after cleaning products．
   Customers could previously try their hand at grabbing "Frozen 2" or "Peter Rabbit" toys from the machines，but no more． "They got removed this morning，" Braddick said of the toys，replacing them with toilet roll and hand sanitizer （洗手液）．Visitors can now pay 50 p for three goes on the toilet roll grabber，or ￡1 a go for Carex，which Braddick described as the "Rolls- Royce of hand sanitizers．"
   Braddick said that his decision was born of a desire to make people feel less stressed in uncertain times． "It's a bit of light relief with everything that's going on，" he said． "Hopefully it will raise a smile，which I think everybody needs．"
   Around the world，travel plans have been severely affected，and tens of millions of people remain at home as part of global efforts to fight against coronavirus．Supermarkets have seen shortages of toilet paper and hand sanitizer as anxious consumers stockpile the products．
   Braddick said the family business，which has been running since 1932，has received more than a dozen calls from potential customers who say they don't want to travel abroad for their holidays and would rather stay in the UK．As for his own measures against coronavirus，Braddick said staff have been told to wash their hands every half hour，which is particularly important for those handling money．

（1）What does the underlined word "sought-after" in paragraph 2 probably mean？

A．Practical
B．Amusing
C．Popular
D．Confusing
（2）What is the third paragraph mainly about？

A．Price for a try．
B．Prizes of the game．
C．New practice of the game．
D．People's love for grabbing toys．
（3）What's the purpose of Braddick's new idea？

A．To make higher profits．
B．To ease people's anxiety．
C．To support his family business．
D．To attract more people to play the game．
（4）What can be inferred from the passage？

A．Tourism may fall into a decline．
B．Braddick's business is experiencing a hard time．
C．Cleaning products will be in shortage for a long time．
D．Everyone in the park is told to wash their hands every half hour．
發(fā)布：2024/11/17 4:30:2組卷：10引用：1難度：0.4
解析
3．For many kids，the Internet is at their fingertips．From computers to smartphones，a web of information is open to them．According to a new report，about three out of four kids aged 12 to 15 connect the Internet using a mobile device from time to time．Many younger kids are online too．
   Julian Zeitlinger，9，from New Jersey，uses his computer to watch videos and play games．To keep him safe online，his parents monitor his web use and discuss Internet safety with him． "I ask my parents whether something is nice or bad，" Julian says．
   Mobile devices offer more ways than ever to share personal information．The information can be dangerous in the wrong hands．A study found that 62% of children aged 8 to 17 have had an unpleasant online experience．
   Have you ever had to enter a parent's e-mail address when signing up for a website？That safety measure is there because of the Children's Online Privacy Protection Act （COPPA）．The law says sites for kids under 13 cannot collect personal information，such as a phone number or full name，without a parent's permission．
   This July，the Federal Trade Commission（FTC） will update COPPA for the first time since the law was created in 1998 when there were no smart phones．The nature of the way kids get online has changed，F(xiàn)TC lawyer Phyllis Marcus said．
   When the changes take effect，COPPA will apply to mobile devices and newer forms of advertising．It will expand what falls under "personal information" to include videos，photographs，and services that give users location．
   COPPA doesn't cover everything that can go wrong online．That is why kids and parents need to know what to look out for and to stop and think before sharing information online．
   "There is a misunderstanding that if a site is following COPPA，it is totally safe，" says privacy expert Shai Samet．He runs kidSAFE，which checks whether a site meets kidSAFE standards and is safe． "It's important that kids know how useful the Internet is but that it also can be dangerous if you are not careful．" he adds．

（1）Julian's parents check his web use to make sure

．
A．he doesn't watch too many videos
B．he doesn't play computer games
C．he controls his online time
D．he stays safe on the Internet
（2）What's one of the changes with COPPA？

A．It broadens the concept of personal information．
B．It prevents users from making their location public．
C．It covers everything that goes wrong online．
D．It says no to any kind of advertising．
（3）People often hold the wrong idea that

．
A．formal websites are always safe
B．the Internet is becoming safer and safer
C．COPPA can ensure their complete safety
D．daily checks prevent future online problems
（4）Why does the author write the passage？

A．To ask parents to look out for their kids．
B．To talk about online safety for children．
C．To introduce a new law．
D．To sell an online product．
發(fā)布：2024/11/17 6:0:1組卷：65引用：5難度：0.5
解析

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