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The lower respiratory system includes the a. lungs. b. esophogus. c. larynx. d. pharynx

How does nitrogen oxides are produced and their air environment impact

What are possible signs and symptoms of drug addiction? check all that apply. declining physical appearance and health failing to meet family, school, or work obligations needing less and less of a drug to get the same effect using drugs when there is no health benefit failing in attempts to stop using a drug stealing to get drugs