根据材料，回答问题。ResearchersDiscoverWhyHumansBeganWalkingUprightMostofuswalkandcar

共享题干题根据材料，回答问题。 Researchers Discover Why Humans Began Walking Upright Most of us walk and carry items in our hands every day. These are seemingly simple activities that the majority of us don't question. But an international team of researchers, including Dr. Richmond from GW's Columbian College of Arts and Sciences have discovered that human walking upright, may have originated millions of years ago as an adaptation to carrying scarce, high-quality resources. The team of researchers from the U. S. , England, Japan and Portugal investigated the behavior of modem-day chimpanzees as they competed for food resources, in an effort to understand what ecological settings would lead a large ape–one that resembles the 6 million-year old ancestor who shared in common with living chimpanzees --to walk on two legs. "These chimpanzees provide a model of the ecological conditions under which our earliest ancestors might have begun walking on two legs," said Dr. Richmond.The research findings suggest that chimpanzees switch to moving on two limbs instead of four in situations where they need to monopolize a resource. Standing on two legs allows them to carry much more at one time because it frees up their hands. Over time, intense bursts of bipedal activity may have led to anatomical changes that in turn became the subject of natural selection where competition for food or other resources was strong.Two studies were conducted by the team in Guinea, The first study was conducted by the team in Kyoto University's " outdoor laboratory" in a natural clearing in Bossou Forest. Researchers allowed the wild chimpanzees access to different combinations of two different types of nut -- the oil palm nut, which is naturally widely available, and the coula nut (可乐果), which is not. The "chimpanzees" behavior was monitored in three situations: (a) when only oil palm nuts were vailable, (b) when a small number of coula nuts were available, and (c)when coula nuts were the majority available resource. When the rare conla nuts were available only in small numbers, the chimpanzees transported more at one time. Similarly, when coula nuts were the majority resource, the chimpanzees ignored the oil palm nuts altogether. The chimpanzees regarded the coula nuts as a more highly-prized resource and competed for them more intensely.In such high-competition settings, the frequency of cases in which the chimpanzees started moving on two legs increased by a factor of four. Not only was it obvious that bipedal movement allowed them to carry more of this precious resource, but also that they were actively trying to move as much as they could in one go by using everything available -- even their mouths.The second study, by Kimberley Hockings of Oxford Brookes University was a 14-month study of Bossou chimpanzees crop-raiding, a situation in which they have to compete for rate and unpredictable resources. Here, 35 percent of the chimpanzees' activity involved some sort of bipedal movement, and once again, this behavior appeared to be linked to a clear attempt to carry as much as possible at one time.1.[不定向选择题]Dr. Richmond conducted the experiment with the purpose of finding____A.when humans began walking on two leg B.what made our ancestors walk upright C.what benefits walking upright brought to our ancestor D.how walking upright helped chimpanzees monopolize resource 2.[不定向选择题]Kyoto Universitry's study discovered that chimpanzees___A.regarded both types of nut as priced resource B.preferred oil palm nuts to coula nut C.liked coula nuts better than oil palm nut D.ignored both types of nut altogether

1.参考答案：B
参考解析：题干：Richmond开展实验的目的是为了发现____．?细节题。利用题干关键词Richmond和experiment可以定位到第一段“The team of researchers from the U．S．，England，Japan and Portugal investigated the behavior of modern-day chimpanzees as they competed for food resources，in an effort to understand what ecological settings would lead a large ape——One that resembles the 6 million--year old ancestor who shared in common with living chimpanzees—to walk on two legs”，即“来自美国、英国、日本和葡萄牙的研究团队调查现代黑猩猩的行为，以此来理解什么生态环境导致黑猩猩双腿行走——黑猩猩与我们600万年前的祖先有相似之处和相同点”，由此可知实验的目的是通过研究黑猩猩的双腿行走来研究我们祖先的双腿行走，所以选项B为正确答案。?
2.参考答案：C
参考解析：题干：日本京都大学的研究发现黑猩猩____。?细节题。利用题干关键词Kyoto University study和选项关键词nut可以定位到第四段“ne chimpanzees regarded the coula nuts as a mole highly-prized resource and competed for them more intensely．”，即“黑猩猩将可乐?果视作更珍贵的资源并且会为此而激烈竞争”由此，选项c为正确答案。3.[不定向选择题]Which of the following statements is NOT true according to the first two paragraphs?A.Many people question the simple human activities of walking and carrying item B.Chimpanzee's behaviors may suggest why humans walk on two leg C.Human walking upright is viewed as an adaptation to carrying precious resource D.Our ancestors have something in common with those modern-day chimpanzee

对的，就是这个意思

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