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scientific
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单项选择题
A．A passenger.B．A driver.C．A customer.D．A conductor.
A．A passenger.
B．A driver.
C．A customer.
D．A conductor.
单项选择题
A．They built the pyramids with the help of ancient machines.B．They built the pyramids with only human labors.C．They built the pyramids with the help of aliens.D．It is still unknown now.
A．They built the pyramids with the help of ancient machines.
B．They built the pyramids with only human labors.
C．They built the pyramids with the help of aliens.
D．It is still unknown now.
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