题目内容
15.The mystery of why humans are the only animals to have chins may have been solved by scientists who suggest that it is connected to the invention of cooking.A paper from the University of Florida tries to explain exactly why humans-unlike all other primates-have chins.
A team led by Dr.James Pampush collected information from more than 100kinds of primate and compared it with historical information.Computer modelling found how the chin developed.
Random genetic change was ruled out because the chin developed 77times faster than the average genetic change.And the study finds no evidence that it served a useful purpose.The research,published in the Journal of Human Evolution,suggests the chin is a by-product of another event.In this case,the event could well be the invention of cooking.
"The chin began to appear as a result of major changes six million years earlier.The arrival of cooking and softer food meant humans no longer needed big teeth and powerful jaws,and over the next two million years to 200,000years both got smaller and the chin was born,"said Dr.Pampush."My guess is that it most likely happened around two million years ago when there was a jump in brain size.The changes which finally lead to the chin are directly related to cooking,and indirectly related to larger brains and bodies."
Dr.Pampush's new theory goes against previous suggestions that the chin was an example of sexual selection,with attractive chins marking out men who are likely to make good mates.The fact that both men and women have chins means the theory is unlikely.
Another theory put forward in the past said that the chin was a way to balance out the stress of chewing,but Dr.Pampush also threw doubt on that idea.
32.The reason why we have chinsB.
A.is connected to humans'action of chewing
B.has something to do with cooking
C.is random genetic change
D.is related to eating time.
33.How did the researchers get their result?D
A.By carrying out experiments.
B.By studying scientific theories.
C.By examining the human brain.
D.By comparing recorded information.
34.Before developing chins,humansA.
A.had bigger teeth
B.cooked softer food
C.had smaller jaws
D.had larger bodies
35.According to Dr.Pampush,the chin most probably appeared aroundC.
A.6million years ago.
B.4million years ago
C.2million years ago
D.0.2million years ago.
分析 本文讲述了人类为什么有下巴.根据科学家的研究可知,人类有下巴与烹饪的发明有关.
解答 BDAC
32.B.细节理解题.根据第一段中的it is connected to the invention of cooking 可知,人类有下巴与烹饪的发明有关.
33.D.写作手法题.根据第三段中的A team led by Dr James Pampush collected information from more than 100 kinds of primate and compared it with historical information 可知,研究 人员是通过数据比较得出的结果
100 kinds of pnmate and compared it with historical information 可知,研究 人员是通过数据比较得出的结果.
34.A.推理判断题.根据倒数第三段中 的 The arrival of cooking and softer food meant humans no longer needed big teeth可以推断,在下巴出现之前,人类的牙齿较大.
35.C.细节理解题.根据倒数第三段中 的 My guess is that it most likely happened around two million years ago 可命,Pampush博士认为下E最可能 出现在约二百万年前.
点评 阅读理解题测试考生在阅读基础上的逻辑推理能力,要求考生根据文章所述事件的逻辑关系,对未说明的趋势或结局作出合理的推断;或根据作者所阐述的观点理论,对文章未涉及的现象、事例给以解释.考生首先要仔细阅读短文,完整了解信息,准确把握作者观点.
A. | who | B. | whom | C. | which | D. | that |