第2题: [单项选择]Questions 19 to 22 are based on the conversation you have just heard. A. Richard hosts’ the program. B. Jill has many hobbies. C. Richard is a sportsman. D. Jill is brave. 参考答案:B 答案解析:[听力原文]19-22 M: Good morning, Jill. Welcome to our program. W: Thanks, Richard. M: It is sa
第4题: [单项选择]吗啡治疗心源性哮喘的机制是 A. 镇静作用 B. 扩瞳作用 C. 止吐作用 D. 缩瞳作用 E. 致吐作用 参考答案:A 答案解析:吗啡治疗心源性哮喘的机制包括;①降低呼吸中枢对二氧化碳的敏感性,使呼吸变慢;②扩张外周血管,降低外周阻力,减轻心脏负荷;③具有镇静作用,可消除患者的焦虑和紧张情绪。
第7题: [单项选择]Viewed from the hilltop, a few neglected farmhouses lay scattered in the valley. If we wanted to find shelter for the night, that was the only place for miles ______ . A. away B. apart C. around D. ahead 参考答案:C 答案解析:around此处是副词,意为“周围,附近”。miles away“数英里以外的”;miles apart“相隔数英里”;miles ahead“数英里以外的前方”。