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1、精选优质文档-倾情为你奉上Before birth, babies can tell the difference between loud sounds and voices. They can even distinguish their mothers voice from that of a female stranger. But when it comes to embryonic learning (胎教), birds could rule the roost. 状语As recently reported in The Auk: Ornithological Advances
2、, some mother birds may teach their young to sing even before they hatch (孵化)。New-born chicks can then imitate their moms call 状语within a few days of entering the world.This educational method was first observed in 2012 by Sonia Kleindorfer, a biologist at Flinders University in South Australia同位语,
3、and her colleagues. Female Australian superb fairy wrens were found 主补to repeat one sound over and over again while hatching their eggs. When the eggs were hatched, the baby birds made the similar chirp to their mothersa sound that served as their regular “feed me!” call同位语.To find out if the specia
4、l quality was more widespread in birds状语, the researchers sought the red-backed fairy wren, 同位语another species of Australian songbird. First they collected sound 定语dated from 67 nests in four sites in Queensland before and after hatching. Then they identified begging calls by analyzing the order and
5、 number of notes. A computer analysis blindly compared calls 定语produced by mothers and chicks, ranking them by similarity.It turns out 主语that baby red-backed fairy wrens also emerge chirping like their moms. And the more frequently mothers had called to their eggs, the more similar were the babies b
6、egging calls. In addition, the team set up a separate experiment that suggested that the baby birds that most closely imitated their moms voice定语 were rewarded with the most food定语.This observation hints that effective embryonic learning could signal 宾语neurological (神经系统的) strengths of children to p
7、arents. An evolutionary inference can then be drawn. “As a parent, do you invest in quality children, or do you invest in children that are in need?” Kleindorfer asks. “Our results suggest that they might be going for quality.”58. The underlined phrase in Paragraph 1 means “ ”.A. be the worstB. be t
8、he bestC. be just as badD. be just as good59. What are Kleindorfers findings based on?A. Similarities between the calls moms and chicks.B. The observation of fairy wrens across Australia.C. The data collected from Queenslands locals.D. Controlled experiments on wrens and other birds.60. Embryonic learning helps mother birds to identify the baby birds which .A. can receive quality signalsB. are in need of trainingC. fit the environment betterD. make the loudest call专心-专注-专业