单项选择题

If the pyramid were flattened out would it look like A，B，C or D？

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单项选择题
If someone could take a sheet of paper 0．1mm thick，tear it in half，put the pieces on top of each other，tear these in half，then repeat the process until the paper had been torn 25 times，what would be the final height of the pile of paper？
A．As thick as a book．
B．As tall as a man．
C．As high as a house．
D．As high as a mountain．
单项选择题
What number should replace the question mark？
A．10
B．9
C．8
D．7
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