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简述CAD的设计步骤?

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简述电子CAD的概念？

用所给单词适当形式填空Indonesians are ________ from earliest childhood to give and receive things with the right hand only.(train)

Match the words and phrases with its proper meaning.

人的认识是一个辩证发展的过程，作为认识的初级阶段的是

A. 直接认识
B. 间接认识
C. 感性认识
D. 理性认识