单词拼写。

1. She's very c_____; she writes plays.

2. He is learning to play the piano. He wants to be a p_____ in the future.  

3. The ice is too thin. It's dangerous to s_____ on it.  

4. She started ice skating at the age of four and b_____ a skating champion when she was ten.  

5. She is good at singing English s_____.  

6. The five-star red flag is our _____ (国家的) flag.  

7. China is an old country with a long _____. (历史)  

8. She became a skating _____ (冠军) when she was ten.  

9. Dengyaping went to Tsinghua _____ (大学) in 1997.  

10. Mr Green spends all his free time with his _____. (孙子)

痛与肉瘤的根本区别在于

A．生长方式

B．发病年龄

C．组织学来源

D．临床症状

E．对全身的影响