对主轴端盖的螺栓须()紧固至规定的扭矩值。
A.分次
B.对称
C.按次序
D.从中间向两侧分次逐渐
参考答案:D
When the seller pays for all charges up to an including the loading of a consignment on board the carrying vessel, the term is ______.
A.CIF
B.FOB
C.CFR
D.CPT
火车的发明者是___________。