题型:问答题 简答题 (共5小题,每小题1分,满分5分)根据对话情景和内容,从对话后方框所给的选项中选出能填入每一空白处的最佳选项—Oh,madam. 小题1: —I'm sorry to say the bill you sent me was incorrect.—Incorrect,madam? 小题2: —Yes,I know. 小题3: —Really,madam?I find it very hard to believe.— 小题4: —Ah.Well,I must apologize,madam.It's the new computer.—Well,don't you think it's about time you got it working properly?It's most inconvenient.—I agree entirely.I'm very sorry about it. 小题5: A. Could you help me?B. That's very strange.C. What can I do for you?D. And what's more,this isn't the first time.E. But I think this is the first time.F. I promise you it won't happen again.G. Look,it's happened five or six times in the past three months. 查看答案
题型:问答题 简答题 呼气末正压通气(PEEP)的作用有()A.使肺泡扩张,减少肺泡气压伤B.增加肺内分流,提高动脉氧分压C.增加肺泡通气量,增加肺泡气-动脉血氧分压差D.提高肺顺应性,增加功能残气量E.降低呼吸作功,增加心排血量 查看答案