問題詳情

37.The following events occur when a mammalian immune system first encounters a pathogen. Place them in correct sequence and then choose the answer that indicates that sequence. I: Pathogen is destroyed. XL: Lymphocytes secrete antibodies.IE: Antigenic determinants from pathogen bind to antigen receptors on lymphocytes.IV: Lymphocytes specific to antigenic determinants from pathogen become numerous. V: Only memory cells remain.
(A) Ⅰ ,Ⅲ, Ⅱ, Ⅳ, Ⅴ
(B) Ⅲ, Ⅱ,Ⅰ, Ⅴ, Ⅳ
(C) Ⅱ,Ⅰ, Ⅳ,Ⅲ,Ⅴ
(D) Ⅳ, Ⅱ,Ⅲ,Ⅰ,Ⅴ
(E) Ⅲ, Ⅳ, Ⅱ,Ⅰ, Ⅴ



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