2008年12月英语六级阅读答案(A卷)(沪江新东方版)

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3. B. it causes sleep loss 本文来自

7. B. the rising proportion of minorities in its population

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50. informally 本文来自

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52. B. By its sustainability

53. D. the decrease of brodiversity

54. C. They are not necessarily sustainable.

55. A. It will go through radical changes.

56. D. To urge people to rethink what sustainable agriculture is.

57. A. They were of inferior races.

58. B. They can do just as well as their predecessors.

59. D. They may forever remain poor and underachieving.

60. C. Prevent them from being marginalized.

61. B. how to help immigrants to better fit into American society.