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【单选题】
某患者，慢性咳嗽8年，有肺气肿体征，1痰不易咯出，气促加重，发绀，血气分析pH7．31，PaCO266mmHg，PaO252mmHg。如何改善该患者的缺氧情况A.
立即吸入高浓度氧
B.
间歇吸入纯氧
C.
立即在呼气末给予正压人工呼吸
D.
低浓度低流量持续给氧
E.
用双氧水静脉内给氧
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举一反三
【判断题】Tenor is a term widely used in sociolinguistics to refer to varieties according t24. Tenor is a term widely used in sociolinguistics to refer to varieties according to use. ()
A.
正确
B.
错误
【单选题】'Opinion' is a word that is used carelessly today. It is used to refer to matters of taste, belief, and judgment. This casual use would probably cause little confusion if people didn't attach too much...
A.
Everyone has a right to hold his own opinion.
B.
Free expression of opinions often leads to confusion.
C.
Most people tend to be careless in forming their opinions.
D.
Casual use of the word 'opinion' often brings about quarrels.
【单选题】抛一枚硬币，正面朝上的概率为P 1 ；掷一枚普通的正方体骰子，掷得的点数小于7的概率为P 2 ；口袋中有红、黄、白球各一个，从中一次摸出两个红球的概率为P 3 ．则P 1 、P 2 、P 3 的大小关系是（ ）
A.
P 3 ＜P 2 ＜P 1
B.
P 1 ＜P 2 ＜P
C.
P 3 ＜P 1 ＜P 2
D.
P 2 ＜P 1 ＜P 3
【简答题】抛掷一枚普通的正方体骰子,点数为 3 的概率是 ( )
【判断题】Register is a term widely used in sociolinguistics to refer to varieties according to use.()
A.
正确
B.
错误
【单选题】In the expression 'On the other side of the coin' in Para. 3 'the coin' is used to refer to______.
A.
the misunderstanding of science
B.
the scientific explanation
C.
the money needed in scientific research
D.
the curiosity of scientists
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