产品组合的宽度是指企业生产经营的产品线的数量。()
查看答案
If a vessel under tow starts jumping on its tow line,the most appropriate action to alleviate the condition is to ______.
A. Change course
B. Slow down
C. Heave to
D. Adjust tow line length
当改变加工零件时,在数控机床上只要改变加工程序,就可继续加工新零件。()