問題詳情
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.
(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.
參考答案
無參考答案
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