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【单选题】
正常情况下肺弹性阻力的主要来源是A.
惯性阻力
B.
气道阻力
C.
肺组织本身的弹性阻力
D.
肺泡表面张力
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反馈参考答案：
举一反三
【简答题】Indian and Pakistan have fought three wars since 1947, two of them over Kashmir.
【单选题】I have ________ foreign stamps. _________ of them are from the USA. A. hundred; Three hundreds
B.
hundred; Three hundred
C.
hundreds of; Three hundred
D.
hundreds; Three hundreds
【单选题】Have you heard of it ? Firefighters rushed into a burning house, three of them unfortunately in and their lives.
A.
caught; losing
B.
catching; lost
C.
caught; lost
D.
catching; losing
【单选题】Tim has failed three courses this semester, so he will have to ______ them next semester.
A.
remake
B.
repeat
C.
reapply
D.
revise
【单选题】Have you heard of it? Firefighters rushed into a burning house, three of them unfortunately ___
A.
138. Have you heard of it? Firefighters rushed into a burning house, three of them unfortunately _____ in and ______ their lives. A．caught; losing
B.
catching; lost
C.
caught; lost
D.
catching; losing
【单选题】Have you heard of it? Firefighters rushed into a burning house, three of them unfortunately _______ in and ________ their lives.
A.
catching; lost
B.
caught; lost
C.
caught; losing
D.
catching; losing
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