根据每句话的意思以及首字母填入恰当单词，使得句意连贯。

1. I'll send you a c__________ of this book. 　　

2. A cabinet sits in a c__________ of the room. 　　

3. Your answer is not c__________. 　　

4. In our c__________, it is rude to ask someone how much they earn. 　　

5. Some wild animals are in d__________. We should try our best to protect them. 　　

6. It's getting d__________. We should go home now. 　　

7. We have set the d__________ for the wedding. 　　

8. It is a matter of life and d__________ to them. 　　

9. I have no d__________ in doing the math exercise. 　　

10. I like watching D__________ channel very much.

简述石榴子石拼合石的鉴别。