單項選擇題According to historians and specialists in demography,there are（）great population movement(s)in the history of the United States.
A.four
B.three
C.five
D.None of the above
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1.單項選擇題During the third wave of immigration from 1890 to 1910,many came from（）
A.Britain and the Netherlands
B.Austria-Hungary and Russia
C.Japan and China
D.Mexico and Cuba
2.單項選擇題Between 1845 and 1854,about 1.5 million Irishmen emigrated to United States because of（）
A.famine
B.English oppression
C.war
D.Both A&B
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Tasmania is an island which lies（）of the Australian mainland.
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The Great Barrier Reef is included on the World Heritage list because（）
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Why is the southern area of the Northern Territory called the Red Centre of Australia?（）
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Because the country is very narrow,no place in New Zealand is more than（）from the sea.
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The only places in Australia that experience regular winter snowfall and icy conditions are（）
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