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| 作者：不明 来源：www.pccode.net 整理 发布时间：2007-1-25 16:40:12 发布人：wongrs | |
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ave helped, but in many places the gro und was flat. The ape-men ( 37 ) the only possible solution. They reared up as high as possible on their hind limbs and began to walk upright . This vital change of physical position brought about considerable disadvantages. It was extremely unstable and it meant that the already slow ape-men became slo wer still. ( 38 ) , they persevered and their bone structure gradually became ( 39 )to the new,unstable position that ( 40 ) them the name Homo erectus,upright man. 26. A. match B. compare C. rival D. equal 27. A. became B. equipped C. posed D. provided 28. A. in B. upon C. by D. with 29. A. driven B. doomed C. forced D. led 30. A. bestowed B. given C. presented D. endowed 31. A.for B. of C. on D. at 32. A. progressed B.generated C.developed D.advanced 33. A.from
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