题目

I used to watch a little girl playing basketball every day from my kitchen window. One day I asked her why she practiced so much. She said, “I want to go to college. The only way I can go is to get a scholarship. I like basketball and I want to be the best player in college. My dad told me, “If the dream is big enough, the facts don’t count.” She never changed her mind. I watched her through those junior high years and into senior high school. One day before she graduated from high school, I saw her sitting on the grass sadly. I asked her what was wrong. She told me that her coa若集合A={1，3，x}，B={1，x2}，且A∩B=B，则x的值为-3或0或3-3或0或3．