問題詳情

IV. 閱讀測驗: (5%)A widely held theory today is that the ancestors of today’s Native American peoples traveledto the Western Hemisphere from Asia between 25,000 and 30,000 years ago, which was aroundthe same time that Japan was being settled by Stone Age inhabitants. There is dental evidence andblood-type evidence to support this theory. A dental pattern that is found among most ancienthuman fossils in the Americas is consistent with the dental pattern of ancient human fossils innortheastern Asia. In blood type, the fact that blood type B is almost nonexistent among NativeAmerican populations but exists in Asian populations leads to the conclusion that migrations to theAmericas from Asia took place before the evolution of blood type B, which is believed to haveoccurred around 30,000 years ago. In addition to the dental and blood-type evidence, moregeneral evolutionary evidence suggests that it took more than 20,000 years for the variety ofphysical traits common to Native American populations to evolve, and linguists broadly concurthat the development of the approximately 500 distinct languages of the Native American wouldrequire approximately 25,000 years.The proposed migration from Asia to the Americans took place during the Ice Age thatcharacterized the Pleistocene epoch. During that period of time, there were huge glaciers holdingenormous volumes of water, and, because of the huge glaciers, sea levels were as much as 100meters lower than they are today. The reduced sea levels meant that Asia and North America werelinked with a 750-mile-wide landmass, named Beringia after the Bering Straits that now cover it,and consisted of treeless grassland with warm summers and cold dry winters. Because of thegeographical features of Beringia during the Pleistocene epoch, it was an environment well-suitedto the large mammals of the time, such as mammoth, mastodon, bison, horse, and reindeer, aswell as to the Stone Age hunters who depended on these animals for their existence. The StoneAge inhabitants of the area used these animals not only for food but also for shelter, clothing, andweapons; they were able to spread out and expand their hunting areas as their populations grew,and their populations most likely grew at a very high rate because of the huge amount of territoryavailable for expansion.In spite of the evidence, not all anthropologists are convinced that the migrations from Asia tothe Americas took place as early as 25,000 to 30,000 years ago. There is general agreement thatthe migrations took place, but some believe that the migrations took place much later. Nofossilized human bones have been found in what used to be Beringia; finding human bones datingfrom 25,000 to 30,000 years ago would be strong proof of the dates when the migration took place.However, because what was once Beringia is submerged beneath ocean waters, it may be aformidable task to uncover fossil evidence of migration from Asia to the Americas throughBeringia.
46..The phrase broadly concur in paragraph 1 is closet in meaning to .
(A) to hold opposite views
(B) to have heated debates
(C) to be skeptical of the status quo
(D) to reach an agreement

參考答案

答案：D
難度：適中0.538462
統計：A(2),B(1),C(1),D(7),E(0)

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