第23题: [单项选择]Questions 19 to 21 are bused on the conversation you have just heard. A. Its disadvantages outweigh its advantages. B. It is useful if properly used. C. It may well spoil one’s vacation plan. D. It can raise his efficiency. 参考答案:B 答案解析:[听力原文] How does the man feel about e-mail
第26题: [单项选择]关于产科手术的硬膜外麻醉,错误的是() A. 为防止麻醉后仰卧位低血压综合征,麻醉前应适当扩容 B. 麻醉平面应达到T水平 C. 骶尾部的阻滞常难以完善,切皮前应给予一定的辅助用药如哌替啶等 D. 可以实施脊麻硬膜外联合麻醉 E. 常采用2%的利多卡因作为硬膜外用药 参考答案:C 答案解析:阿片类药物会通过胎盘进入胎儿体内造成呼吸抑制。