7在B淋巴細胞的分化抗原(differentiationantigen)中,何種淋巴球的標識(marker)不曾出現?
(A)CD3
(B)CD19
(C)CD20
(D)CD21
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統計: A(12), B(1), C(0), D(0), E(0) #2991978
統計: A(12), B(1), C(0), D(0), E(0) #2991978