The light is swaying .The building is shaking. A woman with a baby in her arms is trying to open the door, but fails. Finding no way, she rushes into her bedroom and there they  _ the earthquake. In a factory building, as the workshop floor swings  under the terrible shaking, workers run for safety. Some hide under the machines and survive, but others who try to run outside are killed by the falling ceilings. These scenes, played by actors and actresses, are from a film of science education Making a split second decisionshown in 1998 on China Central TV to mark the  22nd anniversary  of the Tangshan Earthquake on July 28. By studying actual cases in the earthquake areas and scientific experiments, experts  found that building remain untouched for the first 12 seconds of an earthquake. In this short time, one has the best chance of surviving an earthquake by staying near the inside walls, in bedrooms and under beds, experts concluded in the film. "Earthquake seems to catch the lives of those who run,"said many survivors in the earthquake areas, describing how their friends were killed on the doorways or along the stair steps as they tried to get out of the building. Their advice was proved in the film,"Take a hiding-place where you are rather than run, unless you are sure you can reach a safe open place in ten seconds." What does the writer mainly talk about in the passage?
China Central TV Station made a wonderful film. In an earthquake many people died miserly  . The experts did some important experiment. To run or not to run in an earthquake, which is the right way.