A:癌组织中各细胞的致癌能力及对化学药物的抗性有很大差别
B:肿瘤干细胞的形成可能与原癌基因和抑癌基因的突变有关
C:肿瘤干细胞具有持续分裂、分化的能力
D:一定剂量的化学药物可以特异性的杀伤恶性肿瘤细胞
My name is Sandra. I have a brother.1 name is Tom. We like different 2 I like eggs, apples and hamburgers 3 breakfast and dinner. For dessert (甜点), I like 4. Tom likes oranges, chicken and carrots. We are 5because we often play sports and eat good food.
下列划线词语的含义与现代汉语相同的一项是( )
如图所示的实物连接中,开关闭合时会造成电源短路的是( )