A. pay to John Davids or bearer B. pay to John Davids only C. pay to John Davids not transferable D. pay to John David
A. 打叶、保湿 B. 回缩、保湿 C. 遮阳、保湿 D. 遮阳、平茬
A. 镜像功能 B. 钻孔循环 C. 镗孔循环 D. 螺纹循环
A. 正确 B. 错误