Unless you sign a contract with the insurance company for your goods, you are not entitled ______a repayment for the goods damaged in delivery.

A．to

B．with

C．for

D．on

（）的叙述是错误的。

A．一次交车合格率=一次交车合格车辆数÷报告期全部修竣出厂车总数×100％

B．返修率=汽车返修辆次÷总修竣车辆数×100％

C．返工率是指维修后，车辆回厂重新维修的比率