题目

It was a cold and wet night, I had just left a local club to travel home when I lost control of my car. I crashed into a car, then hit a tree. The force was so great that is knocked the parked car several meters forwards. I was knocked out cold. Worse still, I had no idea that a fire had started under the engine of my car. It then set the tree on fire. Driving behind me was a young man, who I later found out was called Jared. He saw the accident occur and stopped to help me out of the burning car. He put his own life in danger when he got into the back seat to try to undo my seat belt.在一个不透明的盒子里有红球、白球、黑球各一个,它们除了颜色外其余都相同.小明从盒子里随机摸出一球,记录下颜色后放回盒子里,充分摇匀后,再随机摸出一球,并记录下颜色.请用列表法或画树状图(树形图)法求小明两次摸出的球颜色不同的概率.
英语 试题推荐