A：氯化钠、硝酸银、碳酸钠（稀盐酸）
B：醋酸、纯碱、食盐（酚酞试液）
C：硫酸铜、氯化镁、硝酸钾（石灰水）
D：硫酸、硝酸钡、氯化钾（碳酸钠溶液）
一同学在n天假期中观察：
（1）下了7次雨，在上午或下午
（2）当下午下雨时，上午是晴天
（3）一共有5个下午是晴天
（4）一共有6个上午是晴天
则n最小为（ ）
Hello! I'm Dolly. ①I work at a hospital. ②I'm a nurse. My house is not far from the hospital. ③So I walk to work.④And my brother is a teacher.⑤He goes to work by car.
①____ ②____ ③____
④____ ⑤____
A. How does he go to work?
B. Where do you work?
C. What does your brother do?
D. How do you go to work?
E. What do you do?
