Why does the professor say this listen again A To announce her intentions to

Why does the professor say this listen again a to

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11.Why does the professor say this? (listen again) A.To announce her intentions to continue the study herself. B.To encourage her students to do archaeological research. C.To discredit the recent research on bananas and phytoliths. D.To highlight the university's reputation in archaeology. 解析:(4’04’’)重复语句:Clearly, more research needs to be done. Perhaps by some new scholars from this university? At least give it some thought. 明显的是,需要做更多的研究。可能是这所大学的新学者?教授这句话的意思是暗示学生可以考虑一下这方面的研究。正确答案:B Lecture 1 梗概:教授开篇提出本讲座话题,新发现挑战已建立的理论。然后以香蕉何时引入非洲为例来详谈。原本理论认为香蕉是在2000年前由东南亚引入非洲的,但是在乌干达的新发现表示香蕉很可能是5000年前引入的。之后教授开始细谈这个新发现是如何得到的,提到了一个专业术语:phytoliths,并详
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细解释如何通过此物证明年龄。接着,教授对这个新理论提出辩证性质疑,即除此之外没有别的证据。所以最后做了一个开放性的结尾并暗示学生可以去作相关研究。Lecture 2 12.What is the lecture mainly about? 解析:(12’’)学生提出一个问题:I’d like to ask about something I read in an article online, about how the population size of some animal species can affect other animal species, and how other environmental factors come into play too. 动物之间互相影响彼此的数量,以及其他的环境因素也加入这种影响。教授的回答是:Right. Relationships between animal species in a given ecosystem can get pretty complex. Because in addition to predator-prey relationship, there are other variables that affect population size. 正确答案:A 13.Why does the professor mention nonnative species? 解析:(50’’) 在女生提出一个boom and bust cycle的概念之后,教授进行了一下补充。Let’s say there was a species that had access to plenty of food and ideal conditions. Under those circumstances, its population would increase at an ever-accelerating pace. 在男生发出感叹之后,她继续解释,it doesn’t usually happen… (1’18’’)But we do occasionally see exponential growth in nonnative species when they are transplanted into a new environment. 提出 nonnative speices
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  • Spring '15
  • d., B., c., Gypsy moth, Copper Basin

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