13 支配外毛細胞(OHCs)的聽神經元(auditory neurons):
(A)主要是 type I auditory neurons
(B)主要是 type II auditory neurons
(C)type I 與 type II auditory neurons 各 50%
(D)主要是 type III auditory neurons

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統計: A(6), B(45), C(0), D(0), E(0) #1077570