题干
- Thank you very much!
- _________.
A：You're right
B：All right
C：You are welcome
D：OK
答案(点此获取答案解析）
C
- Thank you very much!
- _________.
A：You're right
B：All right
C：You are welcome
D：OK
是方程 
的解，则 
（ ）．