阿摩線上測驗
62. Breathing is usually regulated by
(A) erythropoietin levels in the blood
(B) the concentration of red blood cells
(C) hemoglobin levels in the blood
(D) CO2 and O2 concentration and pH-level sensors
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統計： A(0), B(0), C(0), D(1), E(0) #3389887
統計： A(0), B(0), C(0), D(1), E(0) #3389887
