Methods: The cell line transfected with E 1 A gene was treated by Epirubicin, Taxotere and 5 - fluorouracil respectively.方法通过PEI -Fe3O4 纳米粒介导将E1A基因导入 人乳腺癌细胞系MCF-7,经G418筛选获得稳定表达E1A的转染细胞(MCF-7-E1A )....
学校不应该体罚学生.Schools should not mete out physical punishment to children.现在许多学校禁止体罚.Nowadays, corporal punishment is banned in many schools.当然, 体罚和管束在施行的当时还是有效的.Physical compulsion or restraint was effectual, of course, whi...