答案出现在结尾处,问题是作者对于人类口语交流(human speech)总结了什么。原文为human speech lacks the stability and permanence of the printed word,也基本跟正确选项A一模一样。
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There was once a man in South America who had a parrot, a pet bird that can imitate human speech.
从前,南美洲有个人养了一只鹦鹉,一种能模仿人类说话的宠物鸟。
What does the speaker say about human speech?
说话者如何评述人类口语?
In other words it's ordered noise, much like human speech.
换句话说,它们唱的是有顺序的噪音,很像人类语言。
Their work reveals a lot about songbird genetics, and opens a new door to understanding the basis of human speech.
VOA: standard.2010.04.05
It is speech that allows a sharing in these qualities that make us fully human.
是辩论能力使促成这些特质的分享,且让我们成为完整的人。
Warren says now that researchers have a map of the zebra finch genome, they can carry out experiments to identify which genes in the finch's brain are most critical to hearing and producing song - and by extension, which genes may play a role in human speech disorders, like those related to stuttering, autism,and Parkinson's disease.
VOA: standard.2010.04.05
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