第3题: [单项选择]哪项不是转移性骨肿瘤的超声表现() A. 局限性骨皮质破坏 B. 边缘不整齐,形态不规则 C. 内部呈均匀性低回声或不规则强回声 D. 晚期肿瘤穿破皮质后在软组织内出现包块 E. 肿瘤内部未见血流信号 参考答案:E 答案解析:转移性骨肿瘤超声表现多样,可发现骨质破坏。因肿瘤内反应性新生骨多少不一,组织纤维化、脂肪变性、出血坏死等原因,实性肿块回声各异,可见低回声型、强回声型及混合回声型,病变边界欠清,内可探及不同程度的血流
第4题: [单项选择]You don't have to install this radio in your new car. It's an ______ extr A. A. excessiveB. optionalC. additionalD. arbitrary 参考答案:B 答案解析:[解析] A项excessive意为“过多的;过分的”;B项optional意为“选择的;非强制的”;C项additional意为“额外的;附加的”;D项arbitrary意为“霸道的;武断的”。
What can we learn about Alice A. She didn’t go to the interview. B. She succeeded in the interview. C. She forgot about the interview. D. She was too nervous in the interview. 参考答案:D 答案解析:[听力原文] W: I heard Alice had been to the interview today. How did it go M: Oh, if she was jus
第27题: [单项选择]Ⅱ度根分叉病变的正确描述是() A. 可探及分叉外形,X线片显示无异常表现 B. 只有一侧可探入分叉区,X线片示骨密度略降低 C. 一侧或双侧可探入分叉区,但不能穿通,X线片示骨密度略降低 D. 探针能通过分叉区,但有牙龈覆盖,X线片示骨密度降低区 E. 探针能通过分叉区,且无牙龈覆盖,X线片示骨密度降低区 参考答案:C 答案解析:Ⅰ度,可及分叉外形,X线片示无异常表现;Ⅱ度,一侧或双侧可探入分叉区,但不能穿通,X线片示骨密度略降低;Ⅲ度,探针能通过分叉区,但有牙龈覆盖,X线片示有骨密度降低区;Ⅳ度,探针能通过分叉区,且无牙龈覆