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【单选题】
The percentage of immigrants in the United States varies greatly from region to region with the _______United States accounting for 14.8% of foreign-born population in the 1980s.
A.
Southern
B.
Northern
C.
Western
D.
Eastern
举报
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】_______ is NOT a political division on the island of Great Britain.
A.
Ireland
B.
Wales
C.
England
D.
Scotland
【单选题】设有单因子试验，因子A有r个水平，在Ai水平下进行mi次重复试验，则误差偏差平方和的自由度为（）。
A.
fe＝r-1
B.
fe＝rm-r
C.
fe＝
mi
miD.
以上都不对
【单选题】During the Cuban Missile Crisis in 1962, President _______finally decided to use naval force to prevent military material and arms from going into Cuba.
A.
Nixon
B.
Johnson
C.
Kennedy
D.
Eisenhower