A.零差錯 B.低于1% C.低于3% D.低于5%
A.60%,70% B.70%,80% C.80%,90% D.90%,100%
A.發(fā)貨后;合同 B.發(fā)貨前;單據(jù) C.簽訂合同后;合同 D.發(fā)貨后;單據(jù)