试题题干
A （ ）is a country with a system of government in which the elected representatives of the people hold the supreme with a non-hereditary head that is an elected President.
参考答案
正确答案：
试题解析
本题主要考查共和国的特点。
A republic is a country with a system of government in which the elected representatives of the people hold the supreme power with a non-hereditary head that is an elected President. 共和国是一种国家政体，在其政府体系下，民选的人民代表拥有最高权力，非世袭首脑是民选总统。
A选项帝国，C选项王国，D选项联邦均不符合题干要求，故选B。