单项选择题
A.Idaho B.Arizona C.Nevada D.Utah
The US Federal Government is composed of the following ...
单项选择题The US Federal Government is composed of the following except （）
A.thelegislative B.thestandingcommittee C.thejudicial D.theexecutive
In Feb. （）came President Nixon’s historic visit to Chin...
单项选择题In Feb. （）came President Nixon’s historic visit to China.
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
