单项选择题
A.15.0 B.45.0 C.60.0 D.90.0
A.焊眼 B.油渍 C.裂纹、开焊 D.生锈
A.0.5m B.1m C.3m D.6m
A.0.8 B.0.9 C.1.0 D.1.1
微信扫一扫,加关注免费搜题