A

When I drove to work yesterday, I met a traffic jam（交通阻塞）.As I looked out of my window, a young man was walking on the street. He was walking to the bridge. There were some homeless men with their cups around there. The young man went to one of them. He brought out some money, said a few words to him and put the money into his cup. He continued（继续）to walk and then saw another homeless man. He stopped for a minute, said a few words and then gave the man a candy.

And then he saw the next homeless man. He was shivering（冷得发抖）because of coldness. The young man now stopped and gave his scarf to him. He then said goodbye to him with a big smile and went away in the snow.

At that moment, I was in tears（流泪）.I gave this young man my best wishes with love and blessings.

银行储蓄、债券投资、基金投资、不动产投资、股票、黄金等都是中国家庭最爱的投资理财方法,细细看来,却没有保险的踪影。专家指出,家庭理财规划必须将保险纳入其中。办理商业保险(　　)

已知氧的相对原子质量为16，用氢气还原氧化铜法测定铜的相对原子质量，实验数据如下：

则铜的相对原子质量为（   ）