39 下列何者為上腭音（palatal sound）的語音特徵？
(A)[+anterior, +high, -back]
(B)[+anterior, -coronal, -back]
(C)[-anterior, +high, -back]
(D)[-anterior, -coronal, -back]

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統計： A(52), B(5), C(49), D(4), E(0) #563078