49. 捲棒使用完畢 (A)應立即清洗(B)2天清洗一次(C)1星期清洗一次(D)1個月清洗一次。

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