单项选择题

A good title for the selection is ______.

A．Archimedes
B．Archimedes’Principle
C．A gold and silver crown
D．The king of Syracuse
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单项选择题
From this selection we may conclude that the king's crown ______.
A．moved less water than pure gold of the same size
B．moved more water than pure gold of the same weight
C．moved more water than pure gold of the same size
D．moved less water than pure gold of the same weight
单项选择题
We drop a piece of metal into a jar full of water, the metal will float if it weighs less than ______.
A．an equal amount of silver
B．an equal amount of gold
C．all the water in the jar now
D．the water that leaves the jar
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