2015年6月四级仔细阅读答案:全球粮食产量下降
2015年6月大学英语四级考试仔细阅读中考察了一篇有关全球粮食作物产量下降的文章，下面是文都整理的参考答案，供各位考生参考：61. C The decline of the grain yield growth
62. A Their self-sufficiency is vital to the stability of world food markets
63. D They focus more on the increase of animal feed than human food grains.
64. D The world will be able to feed its population without increasing farmland.
65. B It is based on a doubtful assumption.
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