第12题: [单项选择]A:How long can I keep the book B:______ A. Yes. You can keep it. B. No. I’m afraid you should return it now. C. Three weeks. But you can renew it if you need it for a longer time. D. You can take it at any time you want. 参考答案:C
第13题: [单项选择]良性与恶性肿瘤判定中,最有诊断意义的是 A. 出血与坏死 B. 生长方式 C. 生长速度 D. 肿瘤的异型性 E. 对机体影响 参考答案:D 答案解析:[解题思路] 肿瘤异型性大小是诊断肿瘤,确定其良、恶性的主要组织学依据。