单项选择题

库存控制管理的定量订货法种，关键的决策变量是（） A.
需求速率 B.
订货提前期 C.
订货周期 D.
订货点和订货量

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多项选择题

应用于非AT供电方式的变压器有（）。
A、单相I,i接线
B、V,v接线
C、三相YN,d11接线
D、Scott接线
E、阻抗匹配平衡接线

单项选择题

It weighs less than three pounds and is hardlymore interesting to look at than an overly ripecauliflower. ___________________________.It has created poetry and music, planned andexecuted horrific wars, and devised intricatescientific theories. It thinks and dreams, plotsand schemes, and easily holds more informa?tion than all the libraries on Earth.

A．The human brain is made of gelatinousmatter and contains no nerve endings
B．The science of neurology has found a wayto map the most important areas of thehuman brain
C．Nevertheless, the human brain is the mostmysterious and complex object on Earth.
D．However, scientists say that each personuses only 10% of his or her brain over thecourse of a lifetime!