最佳答案:Nowadays,experimental usage of animal has become a widely concerned issue around
最佳答案:这东西即使是做这个行业的人都不赞同 但是你想过没 动物的二期临床如果不做直接应用到人体的药会有什么后果,那就是人取代了动物。
最佳答案:As human beings,we should get well with animals.However,if we didn't use them to