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【单选题】
下列关于呼吸衰竭发病机制的说法中错误的是( )A.
通气血流比例失调通常产生缺氧，而无二氧化碳潴留
B.
气体弥散障碍时，机体通常出现低氧血症
C.
O2的弥散功能是CO2的20倍
D.
严重的通气血流比例失调亦可导致二氧化碳潴留
E.
肺动脉内的静脉血未经氧合直接流入肺静脉
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反馈参考答案：
举一反三
【简答题】冠心病的病理基础是A. 动脉粥样硬化
【单选题】The short-term goal of the research is to help a person
A.
whose motor cortex is seriously damaged.
B.
who can operate a wheelchair but not a robotic limb.
C.
who has spinal cord injury but is able to move a wheelchair.
D.
who is unable to move but whose motor cortex is not damaged
【单选题】Arthur Momand used the name ‘Jones’ in his series of short stories because’ Jones’ is ________.
A.
an important name
B.
a popular name in the United States
C.
his neighbour’s name
D.
not a good name
【单选题】What element of a short story might be described as the 'series of related events'?
A.
conflict
B.
character
C.
theme
D.
plot
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