问题
单项选择题
利用沉淀反应进行重量分析时,要求沉淀形式和称量形式()。
A、完全相同
B、完全不同
C、可以相同,也可以不同
D、相对分子质量要小
答案
参考答案:C
利用沉淀反应进行重量分析时,要求沉淀形式和称量形式()。
A、完全相同
B、完全不同
C、可以相同,也可以不同
D、相对分子质量要小
参考答案:C
补全对话 A: Summer holidays will begin next month. Are you going back to your hometown? B: No. 小题1: . A: What are you going to do? B: Mum will take me to Shanghai. 小题2: . A: She’ll be very happy to see you. B: Yes, we haven’t seen each other for several years. A: 小题3: . B: She is an English teacher. She is teaching in Beijing now. But last year she taught in Tianjin. A: 小题4: . B: Yes, she has. She likes traveling. So she always moves to different places to work. A: Is she going to work in Qingdao? B: Yes. 小题5:. A: That’s great.
|