60.下列那些是人類初級(primary)的淋巴細胞生成器官?①bone marrow ②thymus ③spleen ④lymph
nodes ⑤liver
(A)③⑤
(B)①④
(C)②③
(D)①②
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統計: A(200), B(228), C(208), D(2696), E(0) #1947863
統計: A(200), B(228), C(208), D(2696), E(0) #1947863