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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  16
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!
It can be inferred from the passage that a healthy diet______.
选项 A、contains equal amounts of carbohydrates and proteins
B、is low in carbohydrates and high in proteins and fats
C、is balanced between carbohydrates, and proteins and fats
D、needs enough proteins but no fat for us to maintain energy
答案C
解析 推理题。从第四段可知，一个健康的饮食应该是food pyramid(食物金字塔)中有碳水化合物，还应该有一定程度的蛋白质和脂肪，由此可推理得知，C选项(在三者之间平衡)是正确答案。
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