用括号中给的词的适当形式填空
1. We need three______(tomato).
2. Were there some ______( shark) in the zoo?
3. He______( eat) some ice cream for breakfast this moming.
4. Did Tina meet a famous______(act)?
5. I went______( swim) last week.
6. That sounds really______(bore).
7. Their family______(be) watching TV at home at this time yesterday.
8. The twins ______(bear) in 1989.
9. Mozart started_______(write) music when he was four years old.
10. It was a comedy________(call) No Name.
，且
=π／4，则｜a+b｜等于：（）
腭侧牙龈及黏骨膜的神经是（）。