問題詳情
39.tWhich of the following statements concerning adaptive immunity in mammals is correct?
(A)tCell-mediated immune responses are mediated by T cells.
(B)t Humoral immunity is mediated mainly by antibodies and complements.
(C)tHelper T cells play important roles in both cell and humoral immunity.
(D)tAll of the above.
參考答案
答案：D
統計：A:0,B:0,C:0,D:1,E:0
難度：計算中