What is the conversation mainly about A.Online shopping. B.New technology. C.Computers. D.Book stores. A. Online shopping. B. New technology. C. Computers. D. Book stores. 参考答案:A 答案解析:[听力原文] M: Do you do a lot of shopping online W: Not really. I like looking on the Inte
第29题: [单项选择]心包积液 A. 左室扩大,流出道增宽,室间隔及左室后壁运动减弱 B. 室间隔非对称性肥厚,舒张期室间隔厚度与左室后壁之比比1.3:1 C. 心前壁之前和心后壁之后有液性暗区 D. 瓣叶有赘生物及瓣叶穿孔 E. 舒张期二尖瓣前叶呈圆拱状,后叶活动度减弱,交界处融合,瓣叶增厚和瓣口面积减小 参考答案:C