问题
单项选择题
电源是提供电路中所需的（）装置。
A.磁能
B.热能
C.机械能
D.电能
答案
参考答案：D
搜题请搜索小程序“爱下问搜题”
电源是提供电路中所需的（）装置。
A.磁能
B.热能
C.机械能
D.电能
参考答案：D
| 根据对话情景选择恰当的选项，其中有两项是多余的。 | |
Lin Tao: Yes, Mom. 1. Mother: Just set two places. 2. He said he wasn't able to come. Lin Tao: What's the matter with him? Mother: 3. Lin Tao: 4. Did my uncle sound worried? Mother: Yes. He said he would go to see a doctor. Lin Tao: 5. I will ring him up. |