第21题: [单项选择]According to the passage, as compared with televised speeches, traditional political discourse was more successful at ______. 参考答案:B 答案解析:[解析] 事实细节题。原文第三段在比较电视演讲与传统辩论时指出,电视演讲者无法建立历史的情境 (a speaker cannot establish the historical context),从
第22题: [单项选择]治疗消化道出血较为理想的是() A. 钢圈 B. 自体血凝块 C. PVA D. 明胶海绵 E. 氧化纤维素 参考答案:D