阿摩線上測驗
50. How does the author think about the future of xenotransplantation?
(A) The biggest barriers still remain.
(B) The objections may fade when people realize how beneficial it is to the extension of human lives.
(C) The objections may fade as scientists develop less harmful ways to take organs from animals.
(D) The ethical worries have overshadowed the research development.
答案：登入後查看
統計： A(5), B(77), C(12), D(7), E(0) #1874609
統計： A(5), B(77), C(12), D(7), E(0) #1874609
