第28题: [单项选择]{{B}}Questions 11 to 18 are based on the conversation you have just heard.{{/B}} A. The library is closed tonight. B. He doesn’t know how to get to the library. C. Jean is using his car. D. He won’t be able to help the woman. 参考答案:D 答案解析:[听力原文]
W:Do you think you could give me a ride to the library tonight
M:I’d like to,but I’m headi
第33题: [单项选择]镇痛强度为吗啡的1/10,代替吗啡使用的药物是()。 A. 哌替啶 B. 芬太尼 C. 美沙酮 D. 吲哚美辛 E. 纳洛酮 参考答案:A 答案解析:纳洛酮对各型阿片受体均有竞争性拮抗作用,可用于阿片类药物急性中毒。哌替啶主要激动μ型阿片受体,药理作用与吗啡基本相同,镇痛作用弱于吗啡,其效价强度为吗啡的1/10。芬太尼作用与吗啡相似,镇痛效力为吗啡