问题
补全对话，情景问答
| 将下列答语与问句匹配起来，并将序号填在题前括号里。 |
| ( ) 1. What are you doing there? ( ) 2. Are they eating the honey? ( ) 3. What is Mike doing? ( ) 4. Where are they? | A. Yes, they are. B. We are doing homework. C. They are in the woods. D. He is watching insects. |
答案
1. B 2. A 3. D 4. C
cosωt
