9. 下列選項中何者動作-原動肌(prime mover)與其協同肌(synergist muscle)之配對有誤？ (A)肘關節屈曲(elbow flexion)-肱肌(brachialis)-肱橈肌(brachioradialis) (B)膝關節屈曲(knee flexion)- 股二頭肌(biceps femoris)- 腓腸肌(gastrocnemius) (C)肩關節伸展(shoulder extension)-闊背肌(latissimus dorsi)-大圓肌(teres major) (D)肘關節伸展(elbow extension)-伸指肌(extensor digitorum)-肱橈肌 (brachioradialis)