—Do you regret paying 500 dollars for your necklace?

--No, I would gladly pay__________ for it.

A．two times as much

B．twice as many

C．twice as much

D．as twice as much

汽车机械系统故障诊断应以人的经验为基础，充分运用各种现代化分析工具测取各种信息，分析确定故障。