2. 外语
  3. U.S. rates of disease and some cancers,【B1】______of the breast, are among the highest in the world. Many factors【B2】______to can

U.S. rates of disease and some cancers,【B1】______of the breast, are among the highest in the world. Many factors【B2】______to can

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问题     U.S. rates of disease and some cancers,【B1】______of the breast, are among the highest in the world. Many factors【B2】______to cancer and heart disease, including an individual’s genetic【B3】______. But when scientists trace the course of diseases across the globe, the role of【B4】______stands out sharply. Japan offers an example. Tile【B5】______Japanese diet is the direct【B6】______of ours: typically they eat rice, vegetables and a little fish, while Americans put a big【B7】______of meat in the center of the plate and add a few French fries.【B8】______only about a quarter as much fat as we do, and far more carbohydrates, the Japanese live longer than anybody else in the world. That is, until they move to the United States.【B9】______says Dr. Peter Greenwald, director of the Division of Cancer Prevention and Control at the U.S. National Cancer Institute. "When they move to Hawaii, the rate goes up."【B10】______. Similar patterns are emerging all over the globe. "I’ve been in Mauritius, Cuba and Hungary, three completely different countries, advising their governments on nutrition education," says Marion Nestle, professor of nutrition at New York University.【B11】______.
【B7】
选项
答案portion
解析 名词，根据语境可知，日本饮食侧重于大米、蔬菜和鱼类，而美国人则侧重肉类和薯条，portion表示“部分”，a big portion of意为“大部分，大量的”，恰好顺应题意。
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