行李箱拉杆女:初一科学

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出三道速度计算题(要求不同类型)和两道重力计算题,并解答。
注意计算题解题格式!

第一个示数降低,因为究竟蒸发会带走热量,用扇子就会加速酒精蒸发.第二个示数不变

第一个示数降低,因为究竟蒸发会带走热量,用扇子就会加速酒精蒸发.第二个示数不变

第一个示数降低,因为究竟蒸发会带走热量,用扇子就会加速酒精蒸发.第二个示数不变

第一个示数降低,因为究竟蒸发会带走热量,用扇子就会加速酒精蒸发.第二个示数不变

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