问题
单项选择题
下列哪项属于人体常量元素( )
A．铁、锌、碘、硒
B．钙、镁、钾、钠
C．铁、锌、钾、钠
D．钙、镁、碘、硒
答案
参考答案：B
解析： 本题主要考查的知识点是矿物质的分类。
[要点透析] 含量大于0.01%的矿物质称为常量元素，钙、镁、钾、钠、磷、硫、氯7种元素属于人体常量元素。
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下列哪项属于人体常量元素( )
A．铁、锌、碘、硒
B．钙、镁、钾、钠
C．铁、锌、钾、钠
D．钙、镁、碘、硒
参考答案：B
解析： 本题主要考查的知识点是矿物质的分类。
[要点透析] 含量大于0.01%的矿物质称为常量元素，钙、镁、钾、钠、磷、硫、氯7种元素属于人体常量元素。
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| Lucy is one of my friends. She is fourteen. She lives in England. She likes fish. She doesn't like ice cream or strawberries. This is my friend, too. His name is Dick. He is ten. He lives in America. He likes meat. He doesn't like broccoli. He likes ball games. This is me. My name is Wu Dong. I'm a Chinese boy. I am ten. I like fruit and vegetables very much. I don't like eggs or meat. | ||||||||||||||||||||||||
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