A.12t B.24t C.30t D.40t
A.合同要求 B.產(chǎn)品的責(zé)任期 C.產(chǎn)品的壽命 D.數(shù)據(jù)的保存方式
A.50~60mm B.60~80mm C.80~100mm D.80~120mm