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    精英家教网 > 高中英语 > 题目详情
    阅读理解
         Now, we know that if we do not get enough vitamins, we are at risk of developing a number of
    diseases. As a result, vitamin supplements(补品),though expensive, are popular with people who
    worry that they are not getting enough vitamins from the foods they eat. But contrary to what many
    people think, medical experts have found little evidence that most supplements do anything to improve
    health or protect against disease.
         In fact, medical experts warn that taking too many of some vitamins can be harmful. For example,
    too much vitamin E can cause bleeding. People should discuss what vitamins they take with their doctors,
    as some vitamins can produce harmful side effects when mixed with medicines.
         Experts, however, do say that sometimes vitamins can help prevent disease. People who know they
    lack a particular vitamin should take vitamin supplements. Some older adults, for example, may not have
    enough vitamin B-twelve. This is because, as people get older, their body loses its ability to take it from
    foods. Also, people who spend much time inside may need some extra vitamin D as the skin makes this
    vitamin from sunlight.
         Different vitamins are found in different foods. Vitamin A is found in fish liver oil. It also is 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-twelve is found in green leafy vegetables
    and other foods, like fruits. Vitamin K can be found in pork products.
         In fact, for most people, a balanced diet can ensure enough of the vitamins our bodies need. So, it is
    important for us to eat a mixture of foods every day to ensure that we get enough vitamins our bodies
    need.

    1. What is probably talked about before this passage?
    A. How many vitamins a person's body needs.  
    B. How many vitamins some foods contain.
    C. The benefits that vitamins bring to our health.
    D. What people should do to stay healthy.

    2. Vitamin supplements are popular with people because ________.  
    A. people mistakenly think that they are good for their health
    B. they contain more vitamins than the foods people eat
    C. food does not provide enough vitamins people need
    D. people fear that a lack of vitamins will lead to disease

    3. From the passage, we can learn that medical experts advise people _________.
    A. never to take any vitamin supplements  
    B. to depend only on food for their vitamins
    C. not to take any vitamins together with medicines
    D. to consult doctors before taking vitamin supplements

    4. For people who lack Vitamin B-twelve, they can eat more from _______.
    A. sweet potatoes  
    B. green leafy vegetables  
    C. pork products  
    D. eggs
    1-4: CDDB
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    阅读下列短文，从每题所给的（A、B、C和D）四个选项中，选出最佳选项，并在答题卡上将该选项标号涂黑。

    A

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