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A、Because they need more protein than vegetables can supply. B、Because they cannot digest vegetables. C、Because they use more en
A、Because they need more protein than vegetables can supply. B、Because they cannot digest vegetables. C、Because they use more en
admin
2010-10-28
71
问题
Whether or not vegetarianism should be advocated for adults, (26) it is definitely unsatisfactory for growing children, who need more protein than they can get from vegetable sources. Vegetarianism is just not healthy for them. However, a lacto-vegetarian diet, which includes milk and milk products such as cheese, can be satisfactory as long as enough milk and milk products are consumed.
Meat and cheese are the best sources of usable animal protein and next come milk, fish and eggs.
(27) Slow and careful cooking of meat makes it more digestible and assists in the breaking down of the protein content by the body. However, when cooking vegetables, the vitamins, and in particular the water-soluble vitamin C, should not be lost through over-cooking.
With fruit, vitamin loss is negligible, because the cooking water is normally eaten along with the fruit, and acids in the fruit help to hold in the vitamin C.
Most nutrition experts today would recommend a balanced diet containing elements of all foods, largely because of our need for sufficient vitamins. Vitamins were first called "accessory food factors" since it was discovered, in 1906, that most foods contain, besides carbohydrates, fats, minerals and water, these other substances necessary for health. The most common deficiencies in Western diets today are those of vitamins. The answer is variety in food. (28)A well-balanced diet having sufficient amounts of milk, fruit, vegetables, eggs, meat and fish usually provides adequate minimum daily requirements of all the vitamins.
选项
A、Because they need more protein than vegetables can supply.
B、Because they cannot digest vegetables.
C、Because they use more energy than adults.
D、Because they cannot easily digest milk and milk products.
答案
A
解析
目的原因题 。对处于成长期的孩子而言,蔬菜中能提供的蛋白质数量并不能满足他们的需要(unsatisfactory for growing children)。故正确答案为A项。
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0
大学英语六级
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