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  3. The American public’s obsession with dieting has led to one of the most dangerous health misconceptions of all times. Many telev

The American public’s obsession with dieting has led to one of the most dangerous health misconceptions of all times. Many telev

admin2015-11-11  15
问题     The American public’s obsession with dieting has led to one of the most dangerous health misconceptions of all times. Many television ads, movies, magazine articles, and diet-food product labels would have consumers believe that carbohydrates(碳水化合物)are bad for the human body and that those who eat them will quickly become overweight. We are advised to avoid foods such as potatoes, rice and white bread and opt for meats and vegetables instead. Some companies promote this idea to encourage consumers to buy their "carb-free" food products. But the truth is, the human body needs carbohydrates to function properly, and a body that relies on carbohydrates but is exhausted of this dietary element is not in good shape after all.
    Most foods that we consume on a daily basis like potatoes and rice are loaded with carbohydrates. Contrary to popular belief, carbohydrates have many health benefits; some fight diseases such as high blood pressure and heart disease, and others help to prevent cancer and stroke. Cutting these foods out of your diet may deprive your body of the many health benefits of carbohydrates.
    One of the best benefits of carbohydrates is their ability to help to maintain the health of our organs, tissues, and cells. Scientific studies have shown that one type of carbohydrate called fiber reduces the risk of heart disease. Carbohydrates also contain antioxidants(抗氧化剂), which protect the body’s cells from harmful particles with the potential to cause cancer.
    This does not mean that the human body can survive on a diet composed entirely of carbohydrates. We also need certain percentages of proteins and fats to maintain healthy bodies. But carbohydrates certainly should not be avoided altogether. In fact, the food pyramid, the recommended basis of a healthy diet, shows that a person should consume six to eleven servings of breads and grains, as well as three to four servings each of fruits and vegetables — all carbohydrate-containing foods. It is easy to see why cutting carbohydrates out of a person’s diet is not a good idea.
    The only way to know what is truly healthy for your own body is to talk to a nutritionist or dietician, who can help you choose foods that are fight for you as well as guide you toward a proper exercise program for weight loss, or muscle gain. These professionals will never tell you to cut out carbohydrates entirely! The bottom line: listen to the experts, not the advertisers!
The main purpose of the passage is to______.
选项 A、explain how to live a healthy life
B、describe the variety of carbohydrates
C、advocate a healthy diet
D、promote more physical exercise
答案C
解析 主旨题。根据最后一段可知，作者建议人们不要相信广告商的话，而要听从营养学家的建议，饮食中要含有一定量的碳水化合物。因此比较四个选项，C项(提倡健康饮食)是最合适的。
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