ccess of the immune system in distinguishing foreign substances.
[B] the normal and abnormal activities of the immune system in the body.
[C] the unfavorable effects of the immune system on organ transplantation.
[D] the essential duties of the immune system in guarding the body.
核心詞匯
intricacy n. 錯綜復(fù)雜的事物;紛繁難懂之處
dynamic a. 動態(tài)的,有動力的,有力的
back and forth來回地,反復(fù)地
hive n. 蜂房,蜂箱
organism n. 生物體,有機體
molecule n.分子
tissue n. (動、植物的)組織;薄的紗織品
antigen n. 抗原
epitome n. 摘要,縮影,化身
microbe n. 微生物,細菌
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