60.下列何者為初級淋巴器官(primary lymphoid organ)?
(A)胸腺(thymus)
(B)脾臟(spleen)
(C)扁桃腺(tonsils)
(D)淋巴結(lymph nodes)
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統計: A(777), B(92), C(77), D(225), E(0) #1111468
統計: A(777), B(92), C(77), D(225), E(0) #1111468