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Official 45 Lec 2
Question 3 of 6
According to the professor, why are some cells called "naive"?

A.

They originate from a relatively primitive type of cell.

B.

They are easily eliminated by the immune system.

C.

They are not yet able to recognize any particular protein marker.

D.

They can become part of any one of various organs of the body.

正确答案:C

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