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【单选题】
男性,24岁,反复发作性咳嗽,喘息10年余,再发加重3小时。查体见意识模糊,口唇发绀,双肺呼吸音明显减低,未干湿啰音,心率128次/分,可触及奇脉。为进一步明确诊断及判断病情程度最有意义的检查是A.
痰细胞学
B.
胸部CT
C.
动脉血气分析
D.
PEF占预计值％
E.
皮肤过敏原试验
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举一反三
【单选题】Science is still ______ of the causes of many kinds of cancer.
A.
ignorant
B.
unconscious
C.
conscious
D.
informed
【单选题】Science is still largely ignorant ______ the causes of many kinds of cancer.
A.
about
B.
of
C.
with
D.
to
【单选题】What do scientists mean by saying that the science of crying is still in its infancy?
A.
There is still more to learn about crying．
B.
People have known a lot about crying．
C.
The science of crying is a subject needed to be learned．
D.
The study of crying meets difficulties．
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