第8题: [单项选择]下列关于肠套叠的X线检查,错误的是() A. 钡剂灌肠可由肛门缓缓注入25%硫酸钡生理盐水溶液 B. 钡剂灌肠水平压力为5.9~8.8kPa(60~90cmH2O) C. 可见"同心圆"或"靶环"状块影 D. 可见杯状阴影 E. X线检查对确定肠套叠的诊断和治疗有决定性作用 参考答案:C
第13题: [单项选择]A. Many people live in them. B. They are weak-planned. C. They have everything that people need. D. They have central heating and air-conditioning systems. 参考答案:B 答案解析:[听力原文] What is true about new blocks of flats
A. Give and dispute points of view B. Provide a general overview of the textbook material C. Give detailed information on one part of the general topic D. Invite different view on the top at hand 参考答案:D
第32题: [单项选择]呕血最常见的原因为()。 A. 急性胃黏膜病变 B. 食管静脉曲张破裂 C. 消化道溃疡 D. 食管贲门黏膜撕裂 E. 胃癌 参考答案:C 答案解析:溃疡出血是呕血最常见的原因。出血是由于血管受到溃疡的侵蚀、破裂等所致。出血量的多少与被侵蚀的血管大小相一致。少量出血仅表现为大便隐血,大量出血表现为呕血和(或)黑便。原来的溃疡症状在出血前可加重,出血