24.某同学用下图所示装置做验证质量守恒定律的实验他将锥形瓶倾斜使稀盐酸与大理石接触待充分反应后天平指针的指�应是 填“a方� “b Template




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tomski24.某同学用下图所示装置做验证质量守恒定律的实验他将锥形瓶倾斜使稀盐酸与大理石接触待充分反应后天平指针的指�应是 填“a方� “b coloring