最佳答案:Observe the temperature of boiling water and the phenomenon when water is in the
最佳答案:As the chart shows,the relation between the density and the temperature of water
最佳答案:通过一系列的实验可知,Deducting over a series of experiments,在选定的凝胶浴浓度、between the 3 factor
最佳答案:当机组与冷却塔连接时,要保证有一定的水压make sure there is some hydraulic pressure when connecting t
最佳答案:开头两个字是想说“合成”吧.The best condition to synthesize this kind of Schiff base is:80 de
最佳答案:1.The samples were dissolved in water according to the ratio of 1:5.2.Heating di