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My cousin is good at all his subjects at school, but he never ________.
1年前
堵住打气筒的出口,打气筒的活塞越向下压越费力,此现象表明:在温度不变的条件下,一定质量气体的体积_________,气体的压强__________。
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Jeans have become one piece of clothing worn by the most people in the world.
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Schools should reward top students who have highest score.
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