第23题: [单项选择]______ the foreign tourists lose their ways, the guide prepares the small cards with the address and name of the hotel. A. In case of B. In case C. In any case D. In that case 参考答案:B 答案解析:in case of介词词组,意为“以防,以备”;in case引导从句,意为“以防,以备”; in any case意为“无论如何”;in that case意为“如果那样”
第26题: [单项选择]肺动脉瓣关闭不全最常见的病因是 A. 特发性肺动脉扩张 B. 继发于肺动脉高压所致肺动脉扩张 C. 肺动脉瓣病变如风湿性心脏病 D. 感染性心内膜炎致肺动脉瓣穿孔 E. 梅毒性肺动脉炎致肺动脉根部扩张 参考答案:B 答案解析:[考点] 肺动脉瓣关闭不全病因 [分析] 风湿病侵犯肺动脉瓣极少见,最常见的病因是继发于肺动脉高压的肺动脉干根部扩张,引起瓣环扩大发生肺动脉瓣关闭不全,如风心病二尖瓣狭窄者。其他少见病因是特发性