第26题: [单项选择]上消化道出血时对病因诊断最有帮助的检查方法是 A. 选择性腹腔动脉造影 B. 内镜检查 C. X线钡餐检查 D. 胃粘膜活检 E. 核素检查 参考答案:B 答案解析:上消化道出血最常见的病因为消化性溃疡,占50%,其次为出血性胃炎、胃癌等,因此对明确上消化道出血病因最有帮助的检查方法是内镜检查。内镜检查既可明确出血原因、部位,还可在内镜下行止血治疗。
第28题: [单项选择]The news report tells us that when the crash occurred ______. A. the ambulances and firemen arrived quickly B. none of the passengers was killed C. no additional help was necessary D. help was long delayed 参考答案:A
第34题: [单项选择]{{B}}Questions 11 to 18 are based on the conversation you have just heard. {{/B}} A. He is a plumber. B. He is a dentist. C. He is a gas station attendant D. He is an engineer. 参考答案:C 答案解析:[听力原文]
W: Could you fill it up with the unleaded
M: Sure. Do you want me to check under the hood