某实验室一共有3种类型的机器人，A型能识别颜色，B型能识别形状，C型既不能识别颜色也不能识别形状。实验室用红球、篮球、红方块和蓝方块对机器人1号和2号进行实验，命令它们拿起红球，但1号拿起了红方块，2号拿起了篮球。
根据上述实验，以下哪项断定一定为真
A．1号和2号都一定是C型。
B．1号和2号都一定不是C型。
C．1号是A型且2号是B型。
D．1号不是B型且2号不是A型。
E．1号可能不是A、B、C三种类型的任何一种。
参考答案：D
解析： 因为当命令机器人拿起红球时，1号拿起了红方块，说明1号能识别颜色不能识别形状；2号拿起了篮球，说明2号能识别形状不能识别颜色。所以，1号不是B型且2号不是A型。
| 根据上面广告选择最佳答案。 | ||
| ||
| 1. I want to go swimming on Sunday. Where can I go? | ||
| A. Green Trees Gym. B. Red Apples Gym. C. Both Green Trees Gym and Red Apples Gym. D. You can't go swimming on Sunday. | ||
| 2. I want to play basketball on Monday morning. Where can I go? | ||
| A. Green Trees Gym. B. Red Apples Gym. C. Both Green Trees Gym and Red Apples Gym. D. Green Apples Gym. | ||
| 3. I play volleyball at 9:00 every morning. Where can you find me? | ||
| A. Green Trees Gym. B. Red Apples Gym. C. Both Green Trees Gym and Red Apples Gym. D. At home. | ||
| 4. I do aerobics every afternoon. So you can call me at 6589417. Do you know where I'm going to be? | ||
| A. At Green Balls Gym. B. At Red Apples Gym. C. in the school. D. On the playground. | ||
| 5. Which gym accepts (接受) mails from computer? | ||
| A. Green Trees Gym. B. Red Apples Gym. C. Green Apples Gym. D. Red Trees Gym. |
与DMC1∶1发生类似反应①的反应，请写出反应方程式 。