41. During strenuous exercise, lactic acid is produced by human muscles because of an insufficiency of _____.
(A) NADH
(B) NAD
(C) ADP
(D) oxygen
(E) glucose
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統計: A(3), B(10), C(1), D(60), E(5) #938281
統計: A(3), B(10), C(1), D(60), E(5) #938281