A. DNA复制 B. 染色体形成 C. 核膜消失 D. 核仁消失 E. 中心粒出现星射线
A. Mainly rice and vegetables. B. Mainly rice and meat. C. Occasionally rice and vegetables. D. Occasionally meat and vegetables.
A. He has never been ill till now. B. He hasn"t had any injuries. C. He has some health problems now. D. He stopped growing because of disease.