3. Which of the following is the best description for single positive T cells?
(A) Mature T helper or cytotoxic T cells.
(B) Only in the thymus.
(C) Ready to undergo positive selection.
(D) They divide rapidly before leaving the thymus.
(E) Undergo apoptosis if they leave the thymus and encounter foreign antigens.
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統計: 尚無統計資料
統計: 尚無統計資料