下图代表人体体液免疫的过程,相关叙述正确的是(    )   A、

下图代表人体体液免疫的过程,相关叙述正确的是(   

 


A、细胞乙可以使靶细胞裂解死亡   

B、物质丁包括抗体、淋巴因子等

C、②过程比初次免疫要慢,但免疫效应较强    

D、②过程必须经过④过程的刺激

答案

D

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