第24题: [单项选择]What does the man mean A. He went mountain climbing last year. B. He doesn’t want to go at all. C. He hasn’t traveled around the world yet. D. He wants to go climbing. 参考答案:B 答案解析:[听力原文] W: Would you like to go mountain climbing with us this Sunday M: That’s the last thing
第30题: [单项选择]乳腺癌的共同声像图特点是 A. 边界不整,呈锯齿状或蟹足状,无包膜,界限不清 B. 内部呈低回声 C. 后壁及后方回声衰减 D. 向组织及皮肤浸润 E. 以上都是 参考答案:E 答案解析:[解析] 乳腺癌的共同声像图特点:肿块形态不规则,边界不整,呈锯齿状或蟹足状,无包膜,向周围组织浸润性生长;内部呈低回声,探头加压时肿块不被压缩;肿块周边可见不规则强回声晕;肿块内有砂砾样或簇状钙化;病变纵横比大于1;后壁及后方回声衰减,CDFI示血流信号丰富,并有新生血管,形成高速高阻及动静脉混叠现象(RI>0.7),PSV>20cm/s。同侧腋窝可有肿大淋巴结。