您要查找的是不是：
- Water is composed of hydrogen and oxygen. 水由氢和氧组成。
- A molecule of water consists of two atoms of hydrogen and one atom of oxygen. 水分子含有两个氢原子和一个氧原子。
- bicarburet of hydrogen 重碳化氢
- Water is a compound of hydrogen and oxygen. 水是氢和氧的化合物。
- Atoms of hydrogen are fused to make helium. 氢原子可熔合成氦。
- Water,you know,is made up of hydrogen and oxygen. 你知道，水是由氢和氧构成的。
- Water is formed of hydrogen and oxygen. 水由氢氧构成。
- Water is made up of hydrogen and oxygen. 水是由氢和氧两种元素组成的。
- Water consists of hydrogen and oxygen. 水由氢和氧组成。
- Water is made up of atoms of hydrogen and oxygen. 水是氢和氧的原子构成的。
- It has studied the action of hydrogen peroxide on nitrous acid. 它研究了过氧化氢对亚硝酸的作用。
- Two atoms of hydrogen combine with one atom of oxygen to form a molecule of water. 两个氢原子和一个氧原子结合而成一个水分子。
- The situation of hydrogen production from propane is summarized. 摘要综述了丙烷催化转化制氢的国内外发展状况。
- The most abundant isotope of hydrogen, H1, with atomic mass1. 氘氢的数量最丰富的一种同位素，H1，原子质量为1
- This paper describes the toxicity and harm of hydrogen arsenide. 这篇文章介绍了砷化氢的毒性及危害性。
- Determination of hydrogen peroxide content.Titrimetric method. 英文名称： Hydrogen peroxide for industrial use.
- The ones without CSE had much lower levels of hydrogen sulfide. 去除CSE组的老鼠硫化氢含量相对低很多。
- The balloon was distended because of filling of hydrogen. 气球因充满了氢气而膨胀。
- A molecule is a thousand times bigger than an atom of hydrogen. 一个分子比一个氢原子大一千倍。
- Catalase catalyes the breakdown of hydrogen peroxide. 过氧化氢酶催化过氧化氢的分解。
