第15题: [单项选择]Passage Two Questions 29 to 31 are based on the passage you have just heard. A. To estimate the extreme weather. B. To develop the satellite technology. C. To improve agricultural output. D. To learn how to change information to maps more efficiently. 参考答案:A 答案解析:[听力原文]29-31 American scientists are developing maps that can identify areas of future floodin
第16题: [单项选择]十二指肠溃疡合并幽门梗阻() A. 胃大部切除术 B. 高选择性胃迷走神经切断术 C. 胃癌根治术 D. 胃空肠吻合术 E. 全胃切除术 参考答案:A