问题
猜谜题，问答题
| 根据表格，在横线上写出正确答案。 | |||||||||||||||||||||||||
Mike: 2. Doctor: What's the matter? Sarah: 3. Doctor: What's the matter? John: 4. Doctor: What's the matter? Liu Yun: |
答案
1. I have the flu.
2. I have a fever.
3. I have a headache.
4. I have a stomachache.
2H2O+O2↑。用此法制氧气和收集氧气，应选用的装置单元组合为________________________；二氧化锰应放在（填仪器名称）____________________________中；该组合能否控制反应?为什么?____________________。