在顶体反应中，起最重要作用的离子是（）。A．K+ B．Na+ C．Ca2+ D．H+ 发布时间：2017-06-01 08:27 │ 来源：www.tikuol.com 题型：单项选择题 问题： 在顶体反应中，起最重要作用的离子是（）。A．K+B．Na+C．Ca2+D．H+
题型：单项选择题 任务型阅读Hello! I'm Linlin. I'm a girl. I am twelve years old I'm short and slim. I am Chinese. Now I am learning English in London, England. I like English very much. There are six people in my family. They are my father, my mother, my two brothers, my sister and I. They are in Beijing.Hello! I'm Helen. My Chinese name is Hai Lun. I'm an American. My parents live in London. I'm twelve. I'm fine. I'm very tall and strong. Am I a girl? Yes. I am. I am in Nanjing, now. I want to learn Chinese. I know China is a great and an old country with a long history. I like music best. I want to be a singer when I grow up.请根据以上内容，完成下列表格：Li LinHelenNationality (国籍)She is from 1 .She is from 2 .Place living in nowIn 3 , EnglandIn Nanjing, ChinaAppearanceShe is not 4 but slim.She is tall and strong. 5 membersThere are 6 people in her family.Maybe there are three in her family. 7 She is a twelve-year-old girl.She is twelve years old.SubjectsShe likes 8 a lot.She wants to learn Chinese. Music is her 9 .Ideal (理想)She wants to be a singer when she 10 up. 查看答案