第2题: [单项选择]下列错误的是() A. 多数乳腺纤维肿瘤呈T2加权像高信号 B. 乳腺癌在T1加权像可呈高、等、低或混杂信号 C. MRI对乳腺检查的敏感性和特异性最高,是普查的最好方法 D. MRI对乳腺内微钙化不敏感 E. 乳腺纤维肿瘤和腺癌内均可出血 参考答案:C 答案解析:扫MRI时,乳腺良、恶性病变在T1WI均呈等或低信号,在T2WI可呈高、等或略低信号,因此单独依据平扫MRI扫描,病变性质多不易确定。
第25题: [单项选择]What does the woman imply about summer classes A. They’re more expensive than regular classes. B. They’re more boring than regular classes. C. They’re more interesting than regular classes. 参考答案:C 答案解析:[考点] 细节信息理解 [解析] 对话中最后一句女士提到,I think I might consider taking some summer classes,暗示她也想参加一些夏天的