【简答题】国家标准规定在孔、轴公差等级的选用上,采用“工艺等价原则”,对于常用尺寸段公差等级较高的配合,考虑到孔不如轴好加工,孔的公差等级应比轴 级
【单选题】He had understood nothing ______ to understand.
C.
and he had neither sought
【判断题】In product introduction or demonstration, if the listener is not sure about why he/she needs the product, presenters can refer to their own experiences, such as what problems they solved via using the...