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Vitamins are important to our health. Different vitamins are found in different foods, grains, vegetables and fruits, fish and m

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问题     Vitamins are important to our health. Different vitamins are found in different foods, grains, vegetables and fruits, fish and meat, eggs and milk products. So which foods should be eaten to get enough of the vitamins our bodies need? Let us look at some important vitamins for the answer.
    Vitamin A helps prevent skin and other tissues from becoming dry. People who do not get enough Vitamin A cannot see well in darkness. They may develop a condition that dries the eyes. This can result in infections and lead to blindness. Vitamin A is found in fish liver oil. It is also in the yellow part of eggs. Sweet potatoes, carrots and other darkly colored fruits and vegetables contain substances that the body can change into Vitamin A.
    Vitamin B is also called thiamine (硫胶). Thiamine changes starchy foods into energy. It also helps the heart and nervous system work smoothly. Without it, we would be weak and would not grow. We also might develop beriberi (脚气病). Thiamine is found not just in whole grains like brown rice, but also in other foods. These include beans and peas, nuts, and meat and fish.
    Vitamin C is needed for strong bones and teeth, and for healthy blood passages. It also helps wounds heal quickly. The body stores little Vitamin C. So we must get it every day in foods such as citrus fruits, tomatoes and uncooked cabbage.
    Vitamin D increases levels of the element calcium (钙) in the blood. Calcium is needed for nerve and muscle cells to work normally. It is also needed to build strong bones. Vitamin D prevents the children’s bone disease rickets (佝偻病). Ultraviolet light from the sun changes a substance in the skin into vitamin D. Fish liver oil also contains vitamin D. In some countries, milk producers add vitamin D to milk so children will get enough.
    Vitamin K is needed for healthy blood. It thickens the blood around a cut to stop bleeding. Bacteria in the intestines (肠道) normally produce vitamin K. It can also be found in pork products, liver and in vegetables like cabbage, kale and spinach.
It can be inferred from the passage that________.
选项 A、vitamins are sometimes not necessary to our health
B、it is important to eat a mixture of foods every day
C、one food only contains one vitamin
D、fruits contain more vitamins than vegetables
答案B
解析 主旨题。该题目涉及的是Vitamins的总体特点，因此答案应在文章全文得出。文章提到Vitamins对保持健康很重要，vitamins存在于不同的食物之中，因此可以得出结论，每天食用多种食物是很重要的。
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本试题收录于： 英语题库普高专升本分类
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