第一章测试1.What is the anatomical boundary between the upper and lower respiratory tracts?（ ）。
A:The lower margin of cricoid cartilage B:Larynx C:Glottis D:Pharynx
答案:B
2.Which sinuses develop first?（ ）。
A:Maxillary sinuses B:Frontal sinuses C:Sphenoidal sinuses D:Ethmoidal sinuses
答案:D
3.Why are children prone to wheezing?（ ）。
A:great airway resistance B:Large airway diameter C:Small airway diameter D:Small airway resistance
答案:AC
4.There is collateral ventilation in newborns and infants.（ ）
A:错 B:对
答案:A
5.The onset of breathing activities occurs not at birth but in utero. （ ）
A:对 B:错
答案:A
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