单项选择题

A、 A=[2,-1,-3;-2,1,5;1,-3,-1];B=[1;9;-4];A\B
B、 A=（2,-1,-3;-2,1,5;1,-3,-1）;B=[1;9;-4];A\B
C、 A=[2,-1,-3;-2,1,5;1,-3,-1];B=[1,9,-4];A\B
D、A=[2,-1,-3;-2,1,5;1,-3,-1];B=[1;9;-4];A/B

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单项选择题

一台同步速为900r min的三相异步电动机运行时转差率s=0.028，此时转子转速为（）r min。

A．900
B．25
C．875

未分类题

It can be inferred that the author's attitude toward the early stage of British industrialization should be one ofD.admiration.

A.ambiguity.
B.indifferencE.
C.disgust.

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