题目

第二节 完形填空（共20小题；每小题1.5分，满分30分） My first job was at a local diner, where I worked for seven years and learned so many lessons, especially from a fellow waitress. Helen was in her 60s and had extraordinary self-respect, something I was really lacking. I looked up to Helen 41   she was doing what she loved---  42   people--and nobody did it  43  . She always made everyone, customers and co-workers,   44   and feel good.      Being a waitress changed my life. One of my 45 customers was Fred Hasbrook. He always ate an omelet, and when I saw hi写出下列离子的符号：带一个单位正电荷的氢离子 ，带两个单位正电荷的铜离子 ．带三个单位正电荷的铝离子 ，带一个单位负电荷的氯离子 ．带两个单位负电荷的氧离子 ．