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  3. Vitamin D is necessary for health and growth. It is used by the body to form strong bones and teeth. That is why growing childre

Vitamin D is necessary for health and growth. It is used by the body to form strong bones and teeth. That is why growing childre

admin2009-05-15  64
问题     Vitamin D is necessary for health and growth. It is used by the body to form strong bones and teeth. That is why growing children need it.
    Vitamin D is also called the sunshine vitamin. It forms when the skin is exposed to the sun. In the past people Blew what vitamin D was they learned that sunshine was important. Poor children lived in crowded slums (贫民窟). And they were often ill with tickets (软骨病) . In Englad a  tax was once placed on windows. Builders put few windows in houses. Rickets became so common that it was called the English disease.
选项 A、need as much vitamin D as children
B、need less vitamin D than children
C、need more vitamin D than children
D、need no vitamin
答案B
解析 从文章第一段得知。故本题答案为B。
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