设全集U={1,3,5,7,9},A={1,|a-5|,9},CUA={5,7},则a的值为( )。
2或8
补全对话。
Mum: Where 1. you 2. yesterday, Jim?
Jim: I 3. to the store in the morning. I 4. a pair of shoes and a T-shirt. In the afternoon,
I 5. to the gym and 6. ping-pong with Jenny. I 7. Jenny to hit the ball.
Mum: 8. you have fun together?
Jim: No, we didn't.
Much: Why?
Jim: 9. Jenny hurt her hand.
Mum: Oh! I'm 10. to hear that. Is it serious (严重)?
Jim: A little.