A:孟德尔的豌豆杂交实验
B:赫尔希和蔡斯的噬菌体侵染细菌实验
C:萨顿关于基因和染色体行为平行关系的研究
D:摩尔根的果蝇杂交实验
The article written by the famous economist is really _______. None of us can understand it.
35 的分母扩大了3倍后,要使分数的大小不变,分子应加上____。