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17-18版 课后分层集训 选修7 Unit 21 Human Biology (A卷)


课后分层集训 选修 7 Ⅰ.阅读理解 A (2017· 宁夏银川一模) Fighting “Big Soda” Sugar is not good for our health.But you may reason that a single can of Coke every day won't do you much harm.After all,with exercise,you can burn off the calories from that can of Coke anyway. If this is your way of thinking,then congratulations!You are Big Soda's ideal consumer. The term “Big Soda ” refers to two soft drink companies: CocaCola and Pepsi.American soda consumption has experienced a sustained decline.In China, however,it's a different story.According to a Xinhua News Agency report,Coca? Cola's soda sales went up 10 percent in the second quarter this year compared to the same time last year. Increases in soda consumption can be worrisome to health experts.In her recent book Soda Politics: Taking on Big Soda(and Winning), New York University nutrition professor Marion Nestle makes a fiery case against the soda industry.She says it's all right if you drink sweet drinks occasionally.But drinking it every day is “plainly unhealthy”. According to The Economist,one large study cited in Nestle's book found that “for each(12ounce) can added to a person's daily diet,the risk of diabetes jumped by 22 percent.There are also links between sugar and heart disease,obesity,stroke and cancer.” Unlike fruits or even a Big Mac,sweet drinks have no nutritional value.A 12?ounce (340gram) can of Coke,for example,has 140 calories and 39 grams of sugar but no protein or fiber. Nestle also points out that drinking a lot of soda

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