19.下列何種白血球是由淋巴球幹細胞(lymphoid stem cell)演化而來?
(A)monocyte
(B)mast cell
(C)nature killer cell
(D)neutrophil
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統計: A(175), B(119), C(1420), D(70), E(0) #853862
統計: A(175), B(119), C(1420), D(70), E(0) #853862