库存再补货建议表，如果要直接产生请购单，请问请购单上的请购数量是如何来的？（）
A.库存数量
B.安全存量
C.补货点
D.经济批量
参考答案：D
— Mary,are you sure your aunt_____back from America?
— Yes. My mother_____ me. I am going to see her now.[ ]
A. has come; told
B. came; had told
C. had come; tells
D. is coming; has told
质控图分为哪几类？
