[名词解释] 悉生动物(gnotobiotic animal,GN)
[名词解释] 无菌动物(Germ-Free Animal,GF)
[单选题]The experiment ______ the discovery of a cure for cancer.A. happened toB. led upC. resulted inD. set up
[问答题] 实验用动物与实验动物的区别。
[单选题]B.y mentioning the experiment in the second paragraph,the author implies that______.( )[A]our definition of what’s normal varies with gender[B]our focus of attention variesl with gender and age[C]our definition of what’s average changes over time[D]o
[问答题] 简述实验动物与实验用动物的区别?
[问答题] 实验动物和实验用动物的概念是什么?
[单选题]The experiment showed that the smaller fish .A. fought over a feast B. went on diet willinglyC. preferred some extra food D. challenged the boss fish