单项选择题
急性喉头炎症、水肿的患者主要表现为:()。
A.吸气性呼吸困难
B.呼气性呼吸困难
C.劳力气性呼吸困难
D.夜间阵发性呼吸困难
E.端坐呼吸
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单项选择题
判断呼吸衰竭的标准是:()。
A.PaO2<
B.0kPa;PaCO2<
C.67kPa
B.PaO2<
D.67kPa;PaCO2>8.0kPa
C.PaO2<8.0kPa;PaCO2>6.67kPa
D.PaO2<5.32kPa;PaCO2>6.67kPa
E.PaO2<4.0kPa;PaCO2<5.32kPa
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单项选择题
In _____, a small group of Puritans sailed from _____ in the Mayflower to be the first settlers in the New Land.
A.1620,
B.1620,
C.1720,
D.1720,
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