Prevalence is:
a. The number of new cases occurring during a specified period divided by the total population
b. The total number of cases at a specific point in time divided by the specified population
c. The number of new cases occurring during a specified period divided by the population at risk
d. The total number of cases at a specific point in time divided by the population at risk
b
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Increased intensity of sound or fire from a relief valve indicates that the:
A. valve is safely relieving excess pressure. B. valve is reacting to the change of a gas to liquid. C. vessel is overheating and a rupture is imminent. D. vessel is releasing vapor to prevent overloading.
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pCO2 stands for ________
Fill in the blank with correct word.
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