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  3. A balanced diet provides an adequate intake of nutrients for maintenance of

A balanced diet provides an adequate intake of nutrients for maintenance of

游客2023-07-11  56
问题     A balanced diet provides an adequate intake of nutrients for maintenance of the body and therefore good health. A diet can easily be adequate【C1】______normal body functions, yet may not be a balanced diet. An ideal human diet【C2】______fat, protein, and carbohydrates (碳水化合物) in correct【C3】______The exact amount varies for each【C4】______because everyone has different metabolic (新陈代谢的) rates and levels of activity. Malnutrition (营养不良) results【C5】______an unbalanced diet, this is【C6】______an excess of some dietary components and【C7】______of other components. Too much of one component can be as much【C8】______to the body as too little. Energy is【C9】______by carbohydrates, fats and proteins. Proteins are【C10】______used as building blocks for repair of many body tissues. The energy providing compounds are needed in【C11】______quantities in our diet. We also need much smaller amounts of other nutrients, such as vitamins and minerals.【C12】______the small quantities needed these are essential to provide a healthy diet as they have【C13】______roles in metabolic reactions. The【C14】______absorbed are converted to other compounds which are then used for metabolism. Starch, a major carbohydrate, can be then synthesized into fat for【C15】______There are some organic compounds which in spite of being【C16】______for health cannot be made by cells. A balanced diet is imperative to【C17】______a healthy body. People who choose to be vegetarians and【C18】______must make sure that their diet contains all the correct nutrients to【C19】______any deficiencies. This is the same for people living in countries【C20】______their diet lacks certain important food groups. [br] 【C12】
选项 A、Despite
B、Besides
C、Except
D、For
答案 A
解析 逻辑关系题。这句承接前面的意思，前面提到我们还需要少量的其他营养成分，如维生素和矿物质。这句指出“量虽然很小，但它们是健康饮食的必需”，可见前后是转折关系，所以应选Despite“尽管”。Besides“除……之外”；Except“除了”；For“对于”。
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