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Air entering the lungs of a patient thro...

Air entering the lungs of a patient through a tracheotomy (a tube inserted directly into the trachea) is colder and drier than normal, which often causes lung infection. This occurs primarily because the air

A

Enters the respiratory system too rapidly

B

Is not properly humidified by the larynx

C

Does not flow through the nasal passages

D

Does not flow past the mouth and tongue

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AAKASH INSTITUTE ENGLISH-TEST 5-EXAMPLE
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