1 2 3 1 _ _ _ 2 _ _ _ 3 _ _ _ ACROSS 1) imperial dynasty that ruled china (most of the time from 206 bc to ad 220) and expanded its boundaries and developed its bureaucracy; remembered as one of the great eras of chinese civilization 2) an enzyme that catalyzes the oxidation of many body compounds (e.g., epinephrine and norepinephrine and serotonin) 3) an association including most countries in the western hemisphere; created in 1948 to promote military and economic and social and cultural cooperation DOWN 1) group insurance that entitles members to services of participating hospitals and clinics and physicians 2) an aneurysm of the abdominal aorta associated with old age and hypertension 3) a negative ** Scroll down for solution. ** Are you sure you want to peek? han mao oas