14 三歲孩童的口語清晰度(development of intelligibility)已發展到:
(A)50%
(B)92%
(C)80%
(D)64%
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統計: A(24), B(6), C(99), D(38), E(0) #873680
統計: A(24), B(6), C(99), D(38), E(0) #873680