题目

Two years ago my husband buy me a bicycle. If you live in a town, it is often fast than a car and you don’t have to worry parking. You can leave them in any place you like. As it has a seat at the back or a basket at the front, it’s convenient for me to take my little daughter to school, and go shopping. I use it most in summer while the weather is warm and dry. It can be unpleasant in winter, though, when the weather is cold and rain. It can also be dangerous. You should be careful of on a bicycle. Accidents are not the only problem. One day I went shop and came back to find my fro13．分类是学习和研究化学物质的一种常用的科学方法，下列分类正确的是（　　）A．硫酸氢钠能解离出H+，属于酸B．一氧化碳中含有碳元素，属于有机物C．臭氧中含有氧元素，属于氧化物D．碘酸钾的化学式是KIO3，属于盐