第14题: [单项选择]枢椎齿突基底部骨折,但无移位,环椎亦无移位,颏枕带牵引两周后,颈痛减轻,活动范围增加。3周后离床活动,6周后颈痛再次加剧,活动明显受限,并逐渐出现四肢无力与瘫痪,这种迟发性瘫痪的原因是() A. 迟发性血肿压迫 B. 椎管内纤维组织增生压迫 C. 脊髓血运障碍 D. 黄韧带增厚 E. 环椎迟发性前脱位 参考答案:E 答案解析:以上几种情况均可出现迟发性瘫痪,本答案主要根据时间来确定。血肿压迫多于术后1~2周发生。外伤后的纤维增生多发生于伤后半年以上。脊髓血运障碍病情进展快,而黄韧带增厚则进展缓慢。根据外伤史及伤后离床活动后
第29题: [单项选择]Questions 19 to 22 are based on the conversation you have just heard. A. To ask permission to go to America. B. To confirm his business trip schedule. C. To ask how to draft a schedule. D. To consult her business trip. 参考答案:B 答案解析:[听力原文] 19-22 W: Good afternoon, Mr. Peterson. (19) I’ve drafted a schedule for your business trip