問題詳情

7. A characteristic of the circulatory system of arthropods is
(A) lack of a heart.
(B) lack of blood.
(C) lack of blood vessels.
(D) lack of distinction between blood and interstitial fluid.

參考答案

答案:99

統計:A:0,B:0,C:0,D:0,E:0

難度:計算中