题目

完形填空。阅读下面的短文，选出能填入空白处的正确选项This is a   1    girl.   2   name is Wu Yan.   3   is twelve. She is     4      No. 8 Middle School . She is in  5   .Bill is   6   American boy.  7      eleven . He is in No.8 Middle School,   8    . Miss Gao is     9    English teacher. She is a   10  teacher.1. A. Chinese                  B. English           C. American        D. Japanese2. A. His                         B. She’s             C.向100g氢氧化钠溶液中滴入稀盐酸，当溶液的pH=7时，溶液的总质量为150g，把反应后和溶液蒸干得到11.7g的固体，求：（1）滴入稀盐酸溶液的质量为5050克（2）滴入稀盐酸溶液的溶质质量分数．