62.下列何類細菌是口腔牙菌斑的先驅菌(pioneer dwellers)? ① Streptococci ② Prevotella ③ Actinomyces ④ Porphyromonas
(A)①②
(B)①③
(C)②③
(D)②④
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統計: A(178), B(1060), C(94), D(77), E(0) #3199800
統計: A(178), B(1060), C(94), D(77), E(0) #3199800