题目

5、某哺乳动物的一种成熟细胞不含DNA。下图中能正确表示在一定O2浓度范围内，K＋进入该细胞的速率与O2浓度关系是(  ) 答案：A 阅读理解。 　　Han Mei is a Chinese girl．She is thirteen．Her brother's name is Han Lin．He is fourteen．Han Mei is a middle school student．She is a good student．Han Lin and Han Mei go to the same school．Han Mei's father is a doctor．Her mother is an English teacher． (1) How old is Han Mei? [　　] A． She is 11years old． B． She is twelve． C． She is 13． D． She is fourteen． (2) What's her brother's name? [　　] A． His name is Han Ping． B． His name is Han Mei． C． His name is Han Bing． D． His name is Han Lin． (3) Does Han Lin go to school? [　　] A． Yes,he goes to the same school as Han Mei． B． No，he is a worker． C． No，he is a student． D． Yes,he goes to a different school． (4) Is their father a teacher? [　　] A． Yes,he is． B． No，he isn't． C． Yes，he's． D． No，he is． (5) Is their mother a doctor or a teacher? [　　] A． Yes,she is a doctor． B． Yes,she is a teacher． C． She is a doctor． D． She is a teacher．