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CBeing able to tell human faces apart is a skill that almost every person has,although some are farbetter at it than others.But a new study out from the journal Scientific Reports says that this is not just askill that humans possess.Even fish can do it.Following up on research studying different species'abilities to recognize human faces(sheep,dogs,cows,horses,and birds have all been tried),the researchers from the University of Oxford and theUniversity of Queensland decided to pick an animal that does not have an evolved neocortex)the part of the brain that processes sight and sounds,and does not have a close relationship withhumans.That way,there would be no reason why these test subjects would have a past history ofidentifying human faces.So they picked the archerfish,a reef fish variety that shoots water into the air toknock its prey out of the sky.They used this adaptation to have the fish spray water at a face on a monitorhanging over their tanks for a reward.Most of the fish were able to pick out their learned face,even whencolours were taken away or methods were used to make the face shapes unclear.This study gives more backing to the hypothesis (that differentiating between faces is not justa skill that big-brained organisms are born with.It is possible that a good portion of recognizing faces islearned over time.The development of the ncocortex may contribute only to quickly process a large numberof faces in varying situations.But more work needs to be conducted to find a deeper link to this possiblelearned behaviour.The sample size of this study was very small-only eight fish were used altogether.Also,the faces displayed on the monitor were only white,female faces from a German database,shown ina frontal view,with no expressions.Other animal trials have shown that some species,like pigeons,respondmore to differing angles and varied expressions.28.What is the purpose of this passage?A.To introduce a scientific discovery.B.To present the differences between specicsC.To clarify how animals tell human faces apart.D.To introduce the animals that can recognize human faces.29.Why were the archerfish chosen as test subjects?A.They are cleverer than other species.B.They have sharp vision and hearing.C.They aren't closely related to humans.D.They spray water to hit the prey.30.What is the author's attitude toward the study?A.Cautious.B.Negative.C.Consistent.D.Sympathetic.31.Which of the following is suggested for similar studies in the future?A.Including more test subjects.B.Enlarging the human faces.C.Employing more male researchers.D.Using black-and-white pictures.!:16共10而第5页