Which NFPA standard requires all fire fighters to be in their seats, with seat belts secured, whenever the fire apparatus is in motion?

The most common vowel used to combine word parts in medical terms is an:

a. A b. E c. I d. O

The source for many Mycobacterium spp. is

A) animals. B) water. C) soil. D) all of the above. E) A and B.