46. 下面那一項對頭髮成長速度有影響？ (A)營養(B)剪短(C)削髮(D)電棒捲髮。

3. Which of the following best illustrates homeostasis?(A) Most adult humans are between 5 and 6 feet tall.(B) The lungs and intestines have large surface areas(C) When blood salt concentration goes up, the kidney expels more salt.(D) All the cells of the body are about the same size(E) When oxygen in the blood decrease, you feel dizzy