问题
填空题
以无机盐形式存在的元素，根据其在人体中的______可分为______和微量元素．微量元素又分为______、______和______三类．
答案
人体内的化学元素有50多种，含量超过0.01%的是常量元素，其它的为微量元素，微量元素又分为必需元素、非必需元素、有害元素三种．
故答案为：含量；常量元素；必需元素；非必需元素；有害元素．
搜题请搜索小程序“爱下问搜题”
以无机盐形式存在的元素，根据其在人体中的______可分为______和微量元素．微量元素又分为______、______和______三类．
人体内的化学元素有50多种，含量超过0.01%的是常量元素，其它的为微量元素，微量元素又分为必需元素、非必需元素、有害元素三种．
故答案为：含量；常量元素；必需元素；非必需元素；有害元素．
根据短文内容，完成表格，每空一词。 What is your favourite cartoon? It may be difficult for you to decide. But for pianist Lang Lang, Tom and Jerry is the best one. When Lang Lang was two years old, he saw Tom playing the piano. This was his first time to enjoy western music and this experience encouraged him to learn to play the piano. His talent at the keyboard has taken him from Shenyang to the world. Lang became a good piano student at three. Ever since, the boy has been doing better and better. In 1997, the 15-year-old boy studied at a famous American music college. Lang’s performance are full of energy. He is well-known for making facial expressions and moving around while playing the piano. The road to success has never been easy. Lang’s father stopped his job to look after him, while his mother stayed in Shenyang to make money. But Lang considers himself lucky and believes he should give something back. He has helped the children in poor areas a lot.
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