A:胰蛋白酶将动物细胞膜表面的糖蛋白去掉,细胞黏着性降低,细胞散开
B:在培养液中添加抗生素,以便清除代谢产物
C:培养基应置于5%的CO2中,CO2使培养基的pH值维持在7.2~7.4
D:单克隆抗体制备过程中,第一次筛选是为了获取产生特异性抗体的细胞
①.自然因素 ②.社会因素 ③.家庭和学校因素 ④.个人因素
Unlike a film, __________ a passive audience watches and hears __________ is happening on the screen, Real Cine puts you into the action and connects with your senses of sight, smell and touch in an active way.