单项选择题
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A.3 times.
B.6 times.
C.9 times.
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单项选择题
According to the passage , what happens when the temperature is increased in a closed container holding a liquid
A.The liquid and the gas phases become more similar.
B.The liquid and the gas become less dense.
C.The container expands.
D.The liquid evaporates out of the container.
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单项选择题
According to the passage, the difference between a gas and a liquid under normal conditions on Earth is that the liquid ______.
A.is affected by changes in pressure
B.has a permanent structure
C.forms a free surface
D.is considerably more common
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