阿摩線上測驗
43. What process in the body causes someone’s hair to turn gray naturally?
(A) A low supply of the hormone cortisol.
(B) An immune attack caused by stress.
(C) The growth of unusual melanocytes.
(D) The reduction of melanocyte production.
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統計： A(30), B(116), C(109), D(321), E(0) #2298681
統計： A(30), B(116), C(109), D(321), E(0) #2298681
詳解 (共 2 筆)
人定勝天要堅持-忍-
#3960752
(D) 減少黑色素細胞產量。
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