题目

My name is Peter Green. I like taking a walk in the park. It’s raining outside. I can see the beautiful scenery. Taking a walk in the park on rainy days is one of my favorite things to do. Near the park is a national zoo. Suddenly, I see a little elephant. Elephants are smart animals. They can play soccer or music. They can also draw very well. 但是大象正处于极大的危险当中。Today there are only about 300 wild elephants in China. We must save the trees and not buy things made of ivory.I like music too.放学回家，我总是先弹钢琴。I want to be a musician in the future. 在一个细胞周期中，最可能发生在同一个时期的是（ ）A．着丝点的分裂和细胞质的分裂B．染色体的复制和中心粒的复制C．细胞板的出现和纺锤体的出现D．染色体数加倍和染色单体形成