94.下列那一種胺基酸是血清素(serotonin)生合成的前驅物?
(A)arginine
(B)glutamic acid
(C)tryptophan
(D)tyrosine
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統計: A(21), B(11), C(695), D(50), E(0) #1946285
統計: A(21), B(11), C(695), D(50), E(0) #1946285