問題詳情
13. The system that enables oxygen and nutrients to be distributed throughout
the body and blood to be returned to the heart and lungs for replenishment is called the:
(A)cardiovascular system
(B)pulmonary and systemic
circulation
(C) digestive system
(D) respiratory system
參考答案
答案：A
統計：A:33,B:36,C:16,D:9,E:0
難度：困難