Which scientist was the first to put the sun at the center of the “universe”?
a. isaac newton
b. ptolemy
c. nicolas copernicus
d. tycho brahe

True exact date for the withdrawal of american combat troops in iraq was set for august 31st 1. 2011 2. 2010 3. 2012

Which plan proposed to maintain open trade between china and western nations? open door policy national sovereignty missionary diplomacy salutary neglect

What features of the electoral system support the existence of a two party system and analyze one of these features and explain its role