tpo30阅读第3篇答案

　　tpo30阅读第3篇试题

　　B.Play behavior often looks like nonplay behavior.

　　C.Play often occurs in the presence of animals that are not playing.

　　D.Play occurs independently of an animal's intentions.

　　2.According to paragraph 2, which of the following presents a particular challenge toresearchers who study play behavior in animals

　　A.The delay between activities and the benefits the animal derives from them.

　　B.The difficulty in determining which animal species play and which do not.

　　C.The fact that for most animals, there is no clear transition from youth to full adulthood.

　　D.The lack of research on the play behavior of animals other than canids and primates.

　　3.The word "considerable" in the passage paragraph 3 is closest in the meaning to

　　A.Initial.

　　B.Practical.

　　C.Eventually.

　　D.Significant.

　　4.According to paragraph 3, each of the following is a cost to animals that engage inplay EXCEPT

　　A.exposure to predators.

　　B.a buildup of fat stores.

　　C.a loss of fuel that could be used for growth.

　　D.risk of injury from slipping or falling.

　　5.Why does the author include the comment "though they were fed the same diets"?

　　A.To show why rats living in impoverished environments need less food than those living inenriched environments.

　　B.To eliminate the possibility that differences in diet were responsibly for observed differencesin brain weight.

　　C.To emphasize the point that rats were fed only the amount of food needed to keep themalive.

　　D.To suggest that rats fed the same diet have smaller brains than those fed a varied food.

　　6.Paragraph 4 supports which of the following statements about an animal's brain.

　　A.The heavier the brain, the richer the environment in which the animal was raised.

　　B.The younger the animal, the harder it is to develop new connections between nerve cells.

　　C.The larger the animal, the harder it is to develop new connections between nerve cells.

　　D.The larger the animal's cerebellum, the larger will be the animal's nerve cells.

　　7.According to paragraph 5, why might play behavior of prey species be different fromthose of predator species?

　　A.Unlike predator species, prey species use play to prevent inappropriate social behaviors,such as biting.

　　B.Some prey species are physically incapable of certain types of predator movements.

　　C.The survival of each species type is linked to particular sets of muscular movements.

　　D.Predator species have more opportunities to practice play behaviors than prey species.

　　8.The word "comparative" in the passage paragraph 6 is closest in meaning to

　　A.relative.

　　B.temporary.

　　C.sufficient.

　　D.complete.

　　9.Which of the sentences below best expresses the essential information inthehighlighted sentence in the passage paragraph 6 ? Incorrect choices change themeaning in important ways or leave out essential information.

　　A.Only monkeys that have learned to control their selfish and aggressive behaviors can beinvolved in social groups.

　　B.Selfish and aggressive animals like monkeys live in groups in order to practice appropriatesocial behaviors.

　　C.Monkeys and other social animals need to learn behaviors appropriate for their socialgroups.

　　D.Some monkeys are naturally too selfish and aggressive to understand the give-and-take ofsocial groups, so they learn such important behaviors while young.

　　10.What can be inferred from paragraph 6 about the role of adults in play activities ofthe young?

　　A.Adults help their young learn to become dominant within the social group.

　　B.Young animals learn how to play from the adults within their social group.

　　C.Adults allow the young to engage in play behaviors within a protected, sage environment.