根据句意及首字母提示写单词,完成句子。

1. What c_____ is your pencil case?    

2. Her family n_____ is Miller.    

3. B_____ your teeth every day can make you healthy.    

4. I'm too b_____ . I have no time to play with you.    

5. His mother's mother is his g_____.    

6. I want to write a l_____ to my parents.    

7. Many boys like to play c_____ games.    

8. Please give a d_____ of your father.    

9. Does your sister have a s_____ ball?    

10. Mona has three t_____ rackets.

下列哪些选项属于受体的共同特征

A．与配体结合具有饱和性

B．与配体结合具有专一性

C．与配体的结合是可逆的

D．与配体之间具有高亲和力

E．效应的多样性