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  3. About 70 million Americans are trying to lose weight. That is almost 1 out of every 3 people in the United States. Some people g

About 70 million Americans are trying to lose weight. That is almost 1 out of every 3 people in the United States. Some people g

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问题     About 70 million Americans are trying to lose weight. That is almost 1 out of every 3 people in the United States. Some people go on diets. This means they eat less of certain foods, especially fats and sugars. Other people exercise with special equipment, take diet pills, or even have surgery. Losing weight is hard work, and it can also cost a lot of money. So why do so many people in the United States want to lose weight?
    Many people in the United States worry about not looking young and attractive. For many people, looking good also means being thin. Other people worry about their health. Many doctors say being overweight is not healthy. But are Americans really fat?
    Almost 30 million Americans weigh at least 20 percent more than their ideal weight. In fact, the United States is the most overweight country in the world. "The stored fat of adult Americans weighs 2. 3 trillion pounds," says University of Massachusetts anthropologist(人类学家) George Armelagos. He says burning off that stored energy would produce enough power for 900,000 cars to go 12,000 miles.
    Losing weight is hard work, but most people want to find a fast and easy way to take off fat. Bookstores sell lots of diet books. These books tell readers how to lose weight. Each year, dozens of new books like these are written. Each one boasts to help people to get rid of fat.
It can be concluded from the passage that______.
选项 A、people think too much of their appearance
B、there is not a sure way of losing weight as yet
C、surgery is the fastest way of losing weight
D、going on diet is a safe way of losing weight
答案B
解析 回顾本文会发现文章提到各种各样的减肥方法，比如节食、运动、吃药及做手术等等。最后一个段落提到减肥食谱。虽然有如此多的方法，可是事实上美国仍然有这么多的肥胖者，而且作者也觉得这些方法都是吹嘘的，所以不难总结出没有一个能保证有效减肥的方法的结论。
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