表面粗糙度对零件的耐磨性,配合性质,作用寿命都有很大影响。
参考答案:对
---Whose case is it?
--- I’m not quite sure. But maybe it _______ Mr. White.
A.belongs to
B.is belonged to
C.is belonging to
D.belonged to
报检一批进口燕麦,HS编码为10040090,报检员查阅《商品目录》,检验检疫类别为P·R/Q,则可判断该商品为:进境植检,出境商检,出口食品卫生监督检验。()