所有材料都能改变形状。
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哪些物体更容易拉伸,哪些更容易挤压?
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如果你想拉或拉伸什么东西,下面哪一个是最好的选择?
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观看山姆·罗博士主讲的今日专家影片。山姆用什么词来描述金属改变形状?
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Answer incorrect
Look at the slide below to work out the answer.