A:上述过程利用了动物体细胞融合技术
B:上述过程实现了动物细胞的全能性
C:胚胎干细胞的不断增殖和分化潜能保证①过程的进行
D:①、②过程不进行DNA复制和蛋白质合成
9-1-1=____
8-3-2=____
He turned from side to side, eyeing himself in the mirror with a serious, studied ______ that soon changed into a smile.