来自侯连尝的问题
默写出元素周期表中前20号元素符号和名称．___、___、___、___、___、___、___、___、___、___、___、___、___、___、___、___、___、___、___、___．
默写出元素周期表中前20号元素符号和名称．
___、___、___、___、___、___、___、___、___、___、___、___、___、___、___、___、___、___、___、___．
1回答
2020-10-25 19:32