单项选择题
A.1979 B.1972 C.1973
（）part is the most densely populated region in America....
单项选择题（）part is the most densely populated region in America.
A.The southern B.The northeastern C.The western
The political system of the US is based on the followin...
单项选择题The political system of the US is based on the following except （）
A.federalism B.the constitutional monarchy C.the separation of powers D.respect for the constitution E.the rule of law
The American War of Independence started in （）and ended...
单项选择题The American War of Independence started in （）and ended in （）
A.1776，1784 B.1775，1783 C.1706，1714
