|
微信搜索关注"91考试网"公众号,领30元,获取公务员、事业编、教师等考试资料40G!
lves as human beings.［C］ DNA is not destiny; experience plays a powerful role, too.［D］ A gene is only a probability for a given trait, not a guarantee. For that trait to be expressed, a gene often must be “turned on” by an outside force before it does its job. High levels of stress apparently activate a variety of genes, including those suspected of being involved in fear, shyness and some mental illnesses.［E］ The human body contains about 100,000 genes, of which 50,000 to 70,000 are involved in brain function.［F］ The inextricable interplay between genes and environment is evident in disorders like alcoholism, anorexia, or overeating that are characterized by abnormal behaviors. Scientists spiritedly debate whether such syndromes are more or less biologically driven. If they are mainly biological—rather than psychological, social, and cultural—then there may be a genetic basis for them.［G］ The age-old question of whether nature or nurture determines temperament seems finally to have been decided in favor of Mother Nature and her ever-deepening gene pool. 参考答案： 1．C 2．G 3．A 4．E 5．D 1．C 2．G 3．A 4．E 5．D
|
考试问吧
