12. 當肌肉的承受力固定不變，而肌肉有變短的現象時的收縮稱為
(A)等張收縮 (Isotonic Contraction)
(B)等長收縮(Isometric Contraction)
(C)增長收縮 (Lengthening Contraction)
(D)收縮與興奮的連結(Excitation-Contraction Coupling)

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統計： A(3), B(1), C(0), D(0), E(0) #897899