【文章內(nèi)容簡(jiǎn)介】 t? D．The Carbon Footprint of EverythingBIt is easy for us to tell our friends from our enemies．But can other animals do the same? Elephants can! They can use their sense of vision and smell to tell the difference between people who pose a threat and those who do not．In Kenya, researchers found that elephants react differently to clothing worn by men of the Maasai and Kamba ethnic groups．Young Maasai men spear animals and thus pose a threat to elephants。 Kamba men are mainly farmers and are not a danger to elephants．In an experiment conducted by animal scientists, elephants were first presented with clean clothing or clothing that had been worn for five days by either a Maasai or a Kamba man．When the elephants detected the smell of clothing worn by a Maasai man, they moved away from the smell faster and took longer to relax than when they detected the smells of either clothing worn by Kamba men or clothing that had not been worn at all．Garment color also plays a role, though in a different way．In the same study, when the elephants saw red clothing not worn before, they reacted angrily, as red is typically worn by Maasai men．Rather than running away as they did with the smell, the elephants acted aggressively toward the red clothing．The researchers believe that the elephants’ emotional reactions are due to their different interpretations of the smells and the sights．Smelling a potential danger means that a threat is nearby and the best thing to do is run away and hide．Seeing a potential threat without its smell means that risk is low．Therefore, instead of showing fear and running away, the elephants express their anger and bee aggressive．5．According to the passage, which of the following statements is true about Kamba and Maasai people? A．Maasai people are a threat to elephants． B．Kamba people raise elephants for farming． C．Both Kamba and Maasai people are elephant hunters． D．Both Kamba and Maasai people traditionally wear red clothing．6．How did the elephants react to smell in the study? A．They attacked a man with the smell of new clothing． B．They needed time to relax when smelling something unfamiliar． C．They became anxious when they smelled Kambascented clothing． D．They were frightened and ran away when they smelled their enemies．7．What is the main idea of this passage? A．Elephants use sight and smell to detect danger． B．Elephants attack people who wear red clothing． C．Scientists are now able to control elephants’ emotions． D．Some Kenyan tribes understand elephants’ emotions very well．8．What can be inferred about the elephant’s behavior from this passage? A．Elephants learn from their experiences． B．Elephants have sharper sense of smell than sight． C．Elephants are more intelligent than other animals． D．Elephants tend to attack rather than escape when in danger．C Hans was an honest fellow with a funny round goodhumored face．Living alone, every day he worked in his garden．In all the countryside there was no garden so lovely as his．All sorts of flowers grew there, blooming in their proper order as the months went by, one flower taking another flower’s place, so that there were always beautiful things to see, and pleasant odors to smell． Hans had many friends, the most devoted being the Miller．So devoted was the rich Miller to Hans that he’d never go by his garden without plucking a large bunch of flowers or a handful of sweet herbs, or filling his pockets with fruits．The Miller used to talk about noble ideas, and Hans nodded and smiled, feeling proud of having such a friend． The neighbors thought it strange that the rich Miller never gave Hans anything in return, though he had hundreds of sacks of flour, many cows and sheep, but Hans never troubled his head about these, and nothing gave him greater pleasure than to listen to all the wonderful things about the unselfishness of true friendship． In spring, summer, and autumn Hans was very happy, but when winter came, and he had no fruit or flowers to sell, he suffered from cold and hunger．Though extremely lonely, the Miller never came to see him then． “There’s no good in going to see Hans while the snow lasts．” The Miller said to his wife, “When people are in trouble they shouldn’t be bothered．So I’ll wait till the spring es when he’s happy to give me flowers．” “You’re certainly very thoughtful,” answered his wife, “It’s quite a treat to hear you talk about friendship．” “Couldn’t we ask Hans up here?” said their son．“I’ll give him half my meal, and show him my white rabbits．” “How silly you are!” cried the Miller．“I really don’t know what’s the use of sending you to school．If Hans came up here, and saw our warm fire, our good supper, and our red wine, he might get envious, and envy is a most terrible thing, and would spoil anybody’s nature．I am his best friend, and I’ll always watch over him, and see that he’s not led into any temptation．Besides, if Hans came here, he might ask me for some flour．Flour is one thing, and friendship is another, and they shouldn’t be confused．The words are spelt differently, and mean quite different things．Everybody can see that．” He looked seriously at his son, who felt so ashamed that he hung his head down, and grew quite scared, and began to cry into his tea． Spring ing, the Miller went down to see Hans．Again he talked about friendship．“Hans, friendship never forgets．I’m afraid you don’t understand the poetry of life．See, how lovely your roses are!” Hans said he wanted to sell them in the market to buy back his things which were sold during the hard time of the winter． “I’ll give you many good things．I think being generous is the base of friendship．” said the Miller．“And now, as I’ll give you many good things, I’m sure you’d like to give me some flowers in return．Here’s the basket, and fill it quite full．” Poor Hans was afraid to say anything．He ran and plucked all his pretty roses, and filled t