第13题: [单项选择]{{B}}Questions 11 to 18 are based on the conversation you have just heard.{{/B}} A. Make her topic much more general. B. To focus on a narrower topic. C. Change to an entirely new topic. D. Rewrite her research paper. 参考答案:B 答案解析:[听力原文]
M: You are on the right track. But don’t you think it might be better if you can narrow the
第14题: [单项选择]老年人较青年人发病率更高的疝是() A. 脐疝 B. 腹股沟直疝 C. 腹股沟斜疝 D. 绞窄性疝 E. 嵌顿性疝 参考答案:B 答案解析:腹股沟斜疝多见于儿童、青壮年,腹股沟直疝见于年老体弱者。脐疝有小儿脐疝和成人脐疝之分,成人多为中年经产妇女。