【单选题】【消耗次数：1】
母乳可以提供抗感染的生理或生化屏障，以加强免疫力，主要物质是指
①
sIgA
②
淋巴细胞
③
铁蛋白
④
溶菌酶
⑤
以上都是
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关于T淋巴细胞和B淋巴细胞介导的免疫应答，下列哪项是错误的?
①
对TD抗原的应答都产生记忆细胞
②
对TD抗原的应答都需APC处理和呈递抗原
③
都产生效应产物
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效应产物的作用均是特异的
⑤
都能形成免疫耐受
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