阿摩線上測驗
75. What are CD4 and CD8?
(A) proteins secreted by antigen-presenting cells
(B) receptors present on the surface of natural killer (NK) cells
(C) T-independent antigens
(D) molecules present on the surface of T cells where they enhance cellular interaction
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統計： A(0), B(0), C(0), D(1), E(0) #3389900
統計： A(0), B(0), C(0), D(1), E(0) #3389900
