【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...
【简答题】A.He had nothing to do with the Germans. B.He had been sending information to the Germans by playing piano. C.He was a spy planted by the German. D.He was a German.