18.肩部旋轉袖肌(rotator cuff)中的肩胛下肌(subscapularis),其韌帶附著於肱骨(humerus)何處?(A)大結節(greater tubercle)(B)小結節(lesser tubercle)(C)結節間溝(intertubercular sulcus)(D)喙狀突(coracoid process)