按照一定依据把物质进行分类，是认识物质的组成、结构、性质和用途的便捷途径，现有三组物质：①金刚石、水银、冰②五氧化二磷、干冰、生石灰、一氧化碳③食醋、白酒、加碘食盐、纯碱．每组中均有一种物质所属类别与其他三种不同，这三种物质依次是 ____ ____​ ____

A woman, with her son appeared at the far end of the street.

   I was born in the Tronto, Canada. Life looked bright and was filled with hope for my parents and me. My father and mother were married in 1980, and I was born next year.
   As I grew into a man, I often looked to my father for advice and support. There were many things about his character that I admired, but like any young boy, I often thought that my father's ideas were from the past and out of date.
   I did well as a student and was the first person in my family to graduate from university. I went on to be a university professor and writer, and most people would say that I have had a very successful life. But I know much of my success is because of the lessons that he passed onto me.
   On Father's Day, I will look in the mirror and smile. My dad gave me many gifts, including my now bald head (秃顶), and the friendly smile that my friends say I have.
   Thank you again, dad. I miss you. Happy Father's Day.