患者男，50岁，晚期食管癌患者。剧烈痛，VAS8分，服用硫酸吗啡缓释片，300mg/

全身麻醉期间发生低血压的原因是什么？

新概念。   

   I have just    1   a letter from my brother, Tim. He is in Australia. He has been there for six    2   . Tim is an    3   . He is working for a big    4   and he has already visited a great number of    5   places in

Australia. He has just    6   an Australian can and has      7   to Alice Springs, a small town in the    8   of

Australia. He will soon visit Darwin. From there, he will    9   to Perth. My brother has never been    10  

before, so he is finding this trip very exciting.

装修人未申报登记进行住宅室内装饰装修活动的如何进行处理？

涡喷13F型发动机离心增压泵是保证（）和加力燃油泵进口有适当的稳定油压。

红霉素用于脓疱疮等化脓性皮肤病、小面积烧伤、溃疡面的感染和寻常痤疮，涂于患处，一日（）次

A.1

B.2

C.3

D.4