第23题: [单项选择]妊娠期仰卧位低血压综合征的产生是由于()。 A. 胎盘内血流量增加 B. 妊娠子宫压迫下腔静脉 C. 妊娠合并贫血 D. 胎儿供血不足 E. 妊娠囊引起腹主动脉的轻度闭塞 参考答案:B 答案解析:妊娠期仰卧位低血压综合征是由于孕妇长时间仰卧位时,妊娠子宫压近下腔静脉,使回心血量和搏出量均减少。
第25题: [单项选择]{{B}}Questions 11 to 18 are based on the conversation you have just heard. {{/B}} A. He is a plumber. B. He is a dentist. C. He is a gas station attendant D. He is an engineer. 参考答案:C 答案解析:[听力原文]
W: Could you fill it up with the unleaded
M: Sure. Do you want me to check under the hood