Which of the following is a condition where the unburned fire gases accumulate at the top of a compartment ignite and flames propagate through the hot-gas layer or across the ceiling?

A pneumothorax manifests itself clinically as a primary _____ disorder

a. restrictive b. obstructive c. restrictive disorder with a secondary obstructive d. obstructive disorder with secondary restrictive

Pouring boiling water over parts of a fragrant plant then letting it stand for at least 15 minutes describes

A) infusion. B) stimulation. C) distillation. D) immersion.