通读全文，根据对短文的理解，选择正确的答案填空。    

    My name is Tony. I'm1  English boy. I'm twelve years old. I'm a  2 . Jim is my good friend. He3 from the USA. We are in 4  class. He's twelve years old,  5 . I have a nice  6 . Now, look  7  my photo. Jim has a long face, small eyes, brown and short hair. And the boy in a yellow cap is me. Yellow is my favourite 8 . Jim has a  9 . Her name is Kate. She is ten years old. Kate has a round face and  10 eyes. They look different.

用“辗转相除法”求得360和504的最大公约数是（　　）

在个体发育过程中，一个或一种细胞通过分裂产生的后代，在____、____ 和生理功能上发生差异性的变化，这个过程叫做细胞分化．