单项选择题

A．American literature.
B．Elementary education.
C．Art history.
D．Veterinary medicine.
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单项选择题
The passage gives an insight into how the United States could develop a new transport policy for the 21st century.
A．Y
B．N
C．NG
单项选择题
A．To examine the chemical elements in the Ice Age.B．To look into the pattern of solar wind activity.C．To analyze the composition of different trees.D．To find out the origin of carbon-14 on Earth.
A．To examine the chemical elements in the Ice Age.
B．To look into the pattern of solar wind activity.
C．To analyze the composition of different trees.
D．To find out the origin of carbon-14 on Earth.
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