题干
从方框中选出下列各句的最佳应答语。
A. My favourite food is fish. B. No, we have cabbage and rice. C. I have bread and milk for breakfast. D. I'd like some fish and noodles. E. Here you are. |
上或圆内的任意一点，O为坐标原点，
，则
的最小值为（ ）