4. 依照肌肉纖維的排列型態,三角肌的肩峯纖維(acromial fibers of the deltoid)屬於下列那一種形式?(A)多羽狀肌(multipennate muscle)(B)三角狀肌(triangular muscle)(C)梭狀肌(fusiform muscle)(D)帶狀肌(strap muscle)