17 掌指關節(metacarpophalangeal joint)屬於:
(A)屈戌關節(hinge joint)
(B)馬鞍狀關節(saddle joint)
(C)球窩關節(ball-and-socket joint)
(D)髁狀關節(condyloid joint)

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統計: A(4), B(2), C(1), D(9), E(0) #1236989