A、<span style="";font-family:宋体;font-size:14px"">上一指定点或位</span></p><p></p>
B、<span style="";font-family:宋体;font-size:14px"">坐标原点</span></p><p></p>
C、<span style="";font-family:宋体;font-size:14px"">屏幕左下角点</span></p><p></p>
D、<span style="";font-family:宋体;font-size:14px"">任意一点</span></p><p></p>"