题目内容

Is teaching the easiest way for the author to earn a living ?How does he feel about teaching?

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Why does the author teach?

What are the most important reasons the author gives for choosing teaching as his profession?

What does the author mean by saying that as a teacher he has money and power?

质量控制要把工序能力指数（Cpk）控制在。

A. 3σ范围之内
B. 》=1.67
C. =1.67
D. 《=1.67