單項(xiàng)選擇題The most important features in the growth of American economy in the early 20th cenruty were（）

A.the use of steam and electricity as chief energy,the development of lare corporation and the development of railway
B.the development of large corporation,urbanization and the employment in production of new technology
C.the appearance of airplane,the use of electricity on a large scale and urbanization
D.the rapid development of industry,railway and large cities


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1.單項(xiàng)選擇題One of the important decisions at the Yalta Conference was（）

A.the allied landing at Normandy
B.the setting-up of a world organization,the United Nations,to manage peace and security after the war
C.coordinated efforts in war against Japan
D.None of the above

2.單項(xiàng)選擇題Overlord is a code name for（）

A.American lend-lease assistance to the Soviet Union
B.the summit conference at Teheran
C.the allied landing at Normandy,France in 1944
D.the North African campaign

3.單項(xiàng)選擇題American war time objectives were（）

A.the total defeat of Axis powers
B.the establishment of a postwar world order under American leadership
C.coordination of war efforts of the Soviet Union,Britain and the United States
D.Both A and B

4.單項(xiàng)選擇題The consequence of the three neutrality acts of the United States was（）

A.to make the United States gain time to arm itself
B.to actually help the aggressors by making clear that the United States would not intervene
C.to get the United States involved in the war
D.to prevent the United States form being dragged into the war

5.單項(xiàng)選擇題What was the main cause of the Second World War?（）

A.The main cause was big power struggle for control of the world.
B.It was the worldwide economic crisis.
C.It was the military expansion of Japan,and Germany.