改进思路：在中师化学教材中。氨的实验室制法是采用固体ＮＨ４ＣＩ和固体Ｃａ（ＯＨ）２混合加热来制取，由于反应中有水生成，大试管的破损率极高，反应过程难以控制．我们利用破损小试管加工成大容量滴管和固液两用干燥管，与大试管一起组装成多功能实验仪器（如图一）；用 Improvement ideas: In the normal chemistry textbook. Ammonia’s laboratory method is to use solid NH4CI and solid Ca (OH) 2 mixed heating to make, due to the reaction generated water, large test tube breakage rate is extremely high, the reaction process is difficult to control. We use the damaged small tube to process large-capacity dropper and solid-liquid dual-purpose drying tube, and assemble it into a multi-functional experimental instrument together with a large test tube (see Figure 1);