题目内容

呼吸衰竭时，引起机体各系统机能改变的根本原因是

A. 交感神经兴奋
B. 血压升高
C. 弥散性血管内凝血
D. 低氧血症和高碳酸血症

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呼吸衰竭并发胃出血、胃溃疡的发生机制是

A. CO2潴留使胃壁细胞碳酸酐酶活性减弱
B. 缺氧使胃壁血管收缩，胃黏膜屏障作用降低
CO2潴留使胃血管收缩
D. 缺氧使胃壁细胞碳酸酐酶活性增强

P28, paragraph 2,How did Ethelred respond to Danish invasion?

A. fight back
B. pay money to buy peace
C. plead for peace
D. seek assistance

P29, paragraph 2Emme of Normandy married to whom for her second marriage?

A. Svein
B. Ethelred
C. Alfred
D. Cnut

P29, paragraph 3Which is the description of the appearance of Cnut according to Norse sagas?

A. fat nose
B. hooked eyes
C. tall, strong and handsome