试切对刀法是数控系统用新建立的工件坐标系取代前面建立的机床坐标系。
参考答案：对
Of the following signs and symptoms of bowel obstruction, which is related primarily to small bowel obstruction rather than large bowel obstruction
A. Profuse vomiting.B. Cramping abdominal pain.C. Abdominal distention.D. High-pitched bowel sounds above the obstruction.
下列选项不应该是城市分区规划阶段供热系统规划的内容的是( )。
A．估算热负荷
B．选择供热方式
C．布置供热设施的供热干管
D．计算供热干管管径
