多选题:关于固定订购量系统库存控制特点的正确说法有(  )。

题目内容:

关于固定订购量系统库存控制特点的正确说法有(  )。 A.需要随时将库存量与订购点进行比较
B.订购提前期每次随需求情况发生变动
C.库存持有成本随供应商生产能力变动
D.订购批量依据总库存成本最低原则确定
E.每相邻两次订购的问隔期取决于需求量的变化

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