题目内容

MRP有三种输入信息,即主生产计划,库存状态和()信息。2

A. 产品结构
B. 批量
C. 安全库存量
D. 制品定额

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联系自己所学专业,试述医学科研设计的五个原则是什么,各举例说明。

It is true that theseherbs (草药) can be used to _________pain.

A. relief
B. relieve
C. worsen
D. recognize

They are making further efforts to _________the cost of production.

A. increase
B. add
C. gain
D. decrease

My brother told me that he had met with no difficulty _________in learning English grammar.

A. therefore
B. therein
C. whereas
D. whatsoever

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