①哪种比较省火如果需要一盆40℃的温水来洗衣服,你可以采取两种办法来烧水。一种是把一盆冷水放在火上加热,等水温达到40℃的时候,端下来使用；另一种是只在火上烧小半盆水,等烧开了,再掺上大半盆冷水,使温度降到40℃。 ① Which kind of comparison fire If you need a basin of 40 ℃ warm water to wash clothes, you can take two ways to boil water. One is to put a pot of cold water on the heat, and so on when the water temperature reaches 40 ℃, the end down to use; the other is only burning a small half on the fire on the water, so boil, and then mixed with most of the basin of cold water, Allow the temperature to drop to 40 ° C.