. “Would you like to turn that music down？ I‘m writing a letter.” “_____.”

A．No, I‘d like to

B．No, please

C．Yes, sorry.

D．Yes, I‘d like it.

（）是产品、过程、体系与要求有关的固有特性。

A.安装特性

B.设计特性

C.产品特性

D.质量特性