形状公差有哪几个项目?
参考答案:
形状公差有6个项目,即:直线度、平面度、圆度、圆柱度、线轮廓度及面轮廓度。
—What do you want to be?
—I want to be ______. I like talking to people and writing. [ ]
A. a reporter
B. a waiter
C. an actor
D. a bank clerk
通过()可完成车辆路线模型、最短路径模型、网络物流模型等功能。
A.GPS
B.GIS
C.EDI
D.PDA