Siphoning refers to the use of the phenomenon of the difference in height of the liquid level. After filling the liquid into an inverted U-shaped tubular structure, the high end of the opening is placed in a container filled with liquid. The liquid in the container will continue to pass through the siphon tube from The opening exits at a lower position. According to the above definitions, the following are not the principles of the siphon phenomenon:. ['A car driver sucks gasoline or diesel from a drum with a rubber tube.', 'The water surface in the middle and lower reaches of the Yellow River in China is mostly higher than the ground outside the dyke. In Henan and Shandong, farmers draw water from the Yellow River to irrigate farmland.', 'Xiao Wang squeezes the air out of the pipe when changing the water in the fish tank at home, and then inserts the pipe into the water, and the water flows continuously.', "Xiao Liu's family lives on the 30th floor of a community, and the tap water in the home comes from the secondary water supply."]