题25 在无水垢的新铝锅内装入定量的冷水，置于燃气灶上分别用不同大小的火焰将其加热至沸腾(因火焰大小不宜测量，利用燃气灶上的旋钮刻度代指，从点火线至最大线共有四格，分别取旋钮正指5，4，3，2刻度时测量，火焰大小与刻度大小成正比)，并记录下每次所需时间和耗气量(为 Question 25 In the no-scale new aluminum pan, load quantitative cold water and put it on the gas stove with different size flames to heat it to boiling (because the size of the flame should not be measured, use the knob scale on the gas stove to refer to it, from the point There are four grids from the line of fire to the maximum line, which are measured when the knob is positioned at the scale of 5, 4, 3, 2 respectively. The flame size is proportional to the size of the scale, and the required time and air consumption are recorded.