小华做“估测大气压值 的实验时装置如图所示.实验步骤a.将注射器的活塞推至注射器筒的底端排尽筒内的空气.然后用橡皮帽封住注射器的小孔.b Template




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tomski小华做“估测大气压值 的实验时装置如图所示.实验步骤a.将注射器的活塞推至注射器筒的底端排尽筒内的空气.然后用橡皮帽封住注射器的小孔.b coloring