________ The medical assistant is frequently called upon to explain the ownership of film to the patient

An example of a closed-ended question would be:

A) "Tell me about your chest pain." B) "What other surgeries have you had?" C) "Have you taken your medications today?" D) "Where does it hurt?"

Air-oxygen blenders operate using:

A) viscous shearing and vorticity B) Bernoulli's principle C) proportioning valves D) two-stage reducing valves