A. 正确 B. 错误
A. 泽泻 B. 西红花 C. 芡实 D. 薏米
A. 点焊缝的分布 B. 点焊缝的外观 C. 根部顿边间隙 D. 装配圆棒的焊接
A. the call sign and name B. the official number and name C. the port of registry and name D. the port of registry and official number