第4题: [单项选择]患者,男,46岁,无明显诱因出现胸痛,咳嗽,咳黏痰1个月,听诊心脏正常,双肺呼吸音粗。既往体健,无传染病史,无家族遗传病史,无特殊粉尘接触史。CT示对称性分布于两肺门周围的蝶翼样浸润性阴影,肺部MRI示CT所见的病变区呈短T1、长T2信号。则下列诊断中最可能为 A. 肺泡性肺水肿 B. 过敏性肺炎 C. 结缔组织病 D. 肺泡蛋白沉积症 E. 肺泡癌 参考答案:D 答案解析:[解析] 肺泡蛋白沉积症在MRI呈短T1长T2的特征性信号表现,与肺的其他渗出性病变明显不同,加之相应的临床表现,可作出判断;而其他几种疾病首先是MR信号不
A. there were more and more online auctions B. there were more and more Internet users C. the consumers had more money to spend D. there were more goods available on the Internet 参考答案:A 答案解析:细节题,从Finding a bargain was getting easier,owing to the rise of online auctions and Web sites that di