第25题: [单项选择]Questions 11 to 18 are based on the conversation you have just heard. A. It wasn’t very well designed. B. Its results were just as expected. C. It fully reflected the students’ ability. D. Its results fell short of her expectations. 参考答案:D 答案解析:[听力原文] M: How many students passed the final physics exam in your class W: Forty, but still a
第30题: [单项选择]检查肝细胞癌的病灶内血流,用哪一项彩色多普勒技术最简便有效 A. M型彩色多普勒 B. 彩色多普勒血流成像 C. 频谱多普勒 D. 彩色多普勒能量图与超声造影并用 E. 以上都不是 参考答案:D 答案解析:[解析] 原发性肝细胞癌病灶内的血流常表现为丰富的动脉样血流信号,且流速一般较快,阻力指数以低阻型为多,但也可见较高或高阻型,此时选用彩色多普勒血流成像和彩色多普勒能量图均可。而转移性肝癌血流一般出现