41. What is the main idea of the passage?
(A) Animal experiments play a significant role in scientific research.
(B) Fewer kinds of animals should be taken to laboratories.
(C) Scientific experiments can be carried out without animals.
(D) The public are questioning the use of animals in experiments.
答案:登入後查看
統計: 尚無統計資料
統計: 尚無統計資料