用数字和符号表示1个氧原子_12个氢分子_23个碳酸根离子_3五氧化二磷 _4柳钢生产的钢铁的主要成份_5鱼峰山上石灰石的主要成份_6

题干

用数字和符号表示
1个氧原子____2个氢分子____3个碳酸根离子____五氧化二磷 ____
柳钢生产的钢铁的主要成份____ 鱼峰山上石灰石的主要成份____

上一题下一题 0.0难度选择题更新时间:2018-11-08 05:16:41

O,2H₂,3CO₃^2-,P₂O₅,Fe,CaCO

Our Summer Camp
When	On July 5th
Where	A ____mountain village
Who	Stay with the____
What	In the morning, we'll learn to ____animals from the local people. In the afternoon, we'll____about the river. In the evening, we'll enjoy the bright____.