阿摩線上測驗
43.Birds are different from all other living vertebrates because they
(A) can fly;
(B) lack teeth;
(C) have feathers;
(D) are bipedal.
答案：登入後查看
統計： A(1), B(2), C(7), D(3), E(0) #3577772
統計： A(1), B(2), C(7), D(3), E(0) #3577772
