超星 - Exercise 2-respiratory system - 查题吧

单选题

The air sacs through which gases are exchanged in the lungs are the ________.

A. trachea
B. alveoli
C. bursae
D. bronchi

单选题

The structure that holds the vocal cords is the ________.

A. larynx
B. tongue
C. uvula
D. tonsils

单选题

The tubes that carry air from the trachea into the lungs are the ________.

A. arteries
B. nares
C. veins
D. bronchi

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