单项选择题

The best title for this passage is ______

A．Archimedes
B．Archimedes's principle
C．A Gold and Silver Crown
D．The King of Syracuse
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单项选择题
Which of the following orders is true
A．Archimedes took a bath.
B．Archimedes discovered his principle.
C．The King of Syracuse asked him to solve a problem.
D．Archimedes did the experiment on the crown.A. b,c,a,dB. c,a,b,dC. c,a,d,bD. b,c,d,a
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 gold
B．the water that leave the jar
C．all the water in the jar
D．an equal amount of wood
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