题目内容

Which of the following structures separates the lung into lobes?

A. mediastinum
B. Fissure
C. Root
D. pleura

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Each lung is divided into specific segments called_____.

A. Lobes
B. Fissures
C. Pleura
D. bronchi

How many lobes are in the left lung?

A. 1
B. 2
C. 3
D. 4

What structure separates the thoracic cavity from the abdominal cavity?

Aortic arch
B. Mediastinum
C. Diaphragm
D. Chest wall

After a film is exposed, the target-film distance is doubled. The exposure time necessary to obtain a second film of equal density to the first film is

A. Same as first film
B. Two-fold
C. Three-fold
D. Four-fold

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