第11题: [单项选择]下列有关癌细胞的叙述,不正确的是() A. 细胞发生突变后丧失了对分裂的调控 B. 细胞互相接触的时候停止自身增殖 C. 细胞骨架紊乱导致外形易发生改变 D. 细胞黏着性降低能脱离最初附着部位 参考答案:B 答案解析:正常细胞具有接触抑制现象,而癌细胞没有接触抑制现象,故B错。癌细胞不受机体控制;癌细胞的糖蛋白减少,黏着性降低。
考点:本题主要考查癌细胞的产生机理和特点,意在考查考生能理解所学知识的要点,把握知识
第34题: [单项选择]{{B}}Questions 11 to 18 are based on the first conversation you’ve just heard.{{/B}} A. She had to leave for work before Jack. B. She didn’t know Jack’s telephone number. C. Jack had left the house before she called. D. She didn’t know she was supposed to call Jack. 参考答案:C 答案解析:[听力原文]
M: I thought you were going to call Jack this morning, before he left for work.
W: How was