签约:解约的对应关系
A.上班:下班
B.借款:贷款
C.结婚:离婚
D.订货:收货 VHPnoieGsOKb7gkr0R9PuQ90l7lPq8Jsj/wnI4/oWPjNN7etUzuk/je0PZJWolaT