問題詳情
15. The system that allows for the passage of air from outside the body to the
lungs and the exchange of oxygen and carbon dioxide is called the:
(A)
cardiovascular system
(B) respiratory system
(C) respiratory rate zone
(D) anaerobic system
參考答案
答案：B
統計：A:26,B:39,C:14,D:17,E:0
難度：適中