用废盐水瓶做的八个实验吴永宏（江西宜黄一中３４４４００）取医用盐水空瓶（其他大的瓶也可）一个，在其橡皮塞上插入一根弯成直角的吸管（或其他口服液中的吸管）．在吸管后面贴上一带有刻度的标尺（可自已按毫米刻度画出），如图１所示，在吸管水平部分预先装一段带色... Eight experiments using waste brine bottles Wu Yonghong (Yi Huang Yizhong, Jiangxi 344400) took medical saline empty bottles (other large bottles are also available) and inserted a straight-angled straw (or other oral solution) into the rubber stopper. Drinking straw). Attach a graduated ruler to the back of the pipette (it can be drawn by the millimeter scale), as shown in Figure 1, pre-installed in the horizontal section of the pipette with color ...