阿摩線上測驗
38.Which of the following is not a characteristic of amphibians?
(A) They have a
three-chambered heart；
(B) They are ectothermic；
(C) They have a cartilaginous skeleton；
(D) They do not have an amnion.
答案：登入後查看
統計： A(3), B(1), C(9), D(2), E(0) #3325444
統計： A(3), B(1), C(9), D(2), E(0) #3325444
