The ____ provides logistical support to local, county, and state public health departments.

The concentrations of inert gases required for fire extinguishment generally range from ___________by volume

a. 3% to 6% b. 34% to 52% c. 50% to 75% d. 80% to 100%

All of the following are adventitious breath sounds, EXCEPT:

A) rales. B) rhonchi. C) wheezes. D) vesicular sounds.