Water, Chinese name water, Pinyin Shu ǐ, English name water. Oxyhydrogen compound, neutral, chemical formula H2O, structural formula: h-o-h. Relative molecular weight: 18.016. Under normal atmospheric pressure, it is a colorless, tasteless and transparent liquid with freezing point of 0 ℃. The solid formed after solidification is commonly known as ice. Boiling point 100 degrees Celsius, boiling gas produced commonly known as water vapor. Temperature at maximum relative density: 3.98 ℃ specific heat capacity: 4.186j / (g · ℃) 0.1mpa15 ℃ 2.051j / (g · ℃) 0.1mpa100 ℃ density: 1000kg / m3 (at 4 ℃) critical temperature: 374.2 ℃. Water is the most common liquid on the earth, which can be produced by redox reaction of hydrogen and oxygen. Water plays a very important role in the earth's ecosystem, such as participating in photosynthesis, maintaining biological activities, keeping the atmosphere warm and so on. In addition, water also has a very lofty position in Baidu Post Bar. Water B, now has become an honorary title. Water B is now divided into small water B, big water B and Water God. Users who occasionally water posts are called small water B. users who often water posts at a high level are called big water B. users who practice irrigation technology to a high level are called water gods. Now in Baidu Post Bar, water has become a necessary means of survival, users who do not know water will eventually be eliminated by Baidu Post Bar. Shut up! I thought that as an old man of tieba, you came to post. Facing the whole bar, you must have a high opinion. Unexpectedly I have a word, you can listen. I've always known about the life of the landlord. You live in the bar, sign in and upgrade. You should correct and expel evils, and help the bar to calm the people. I'm lucky that the fate is endless. There are still people with lofty ideals and lofty ideals who are flourishing. I'm here to start a school to beg for thieves, Haoshou Pifu and Cang beard old thief! Take it and repl