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（）是电动机最基本的工作状态。其特点是电动机所发出的转矩T的方向与转速n的方向相同。

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（）状态包括电源反接制动和倒拉反接制动。

简述改变他励直流电动机的三种人为机械特性方式。

One of the legal implications of training related deicions include:

A.discrimination
B.negligent training
C.overtime pay
D.all of the above
E.a & b only

The method of analyzing training needs by verifying that there is a performance deficiency is called:

A.task analysis
B.performance analysis
C.on-the-job training
D.job instruction training