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There are four basic of blood in the human body. What do you belong to, A, B, AB

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There are four basic of blood in the human body. What do you belong to, A, B, AB

There are four basic _____ of blood in the human body. What do you belong to, A, B, AB or O?

  A. kinds  B. sorts  C. types  D. classes

 

试题答案

C