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)