题目

第三部分:  阅读理解 (共两节，满分40分) 第一节 （共15小题；每小题2分，满分30分） When Jackie Robinson walked onto Ebbets Field in Brooklyn, New York, on April 15, 1947, he changed baseball forever. As the first African American to play in the Major League in modern times, many believe he changed the country forever.    Robinson was born in 1919. He lived in a time when rules controlled what African Americans could do. He was a top athlete, playing football, basketball and baseball. But playing for a major League team was off limits to Robinson because of his r图甲、乙是有关植物细胞分裂的图象、曲线．请回答下列问题：（1）图乙中AB段对应于图甲的 ，形成的原因是 ．（2）图甲的B、C对应于图乙的 段．（3）图乙的CD段形成的原因是 ，对应于图甲的 ．（4）动物细胞分裂与图甲中所示有明显差异的是 和 （填字母）．（5）图甲所示的整个过程中，其功能一直都处于活跃状态的细胞器是 ．（6）图甲的D和E中，分别位于两极的各组染色体之间是否完全相同 （不考虑染色体变异），为什么？ ．（7）图甲所示的全过程中是否发生了细胞分化？ ．