听力题 Early in January 1967, the dead body of a seventy-three-year-old scientist, Dr. James Hedford, was placed in a special container to be stored until the day when a cure might be found for the dis?ease which had killed him. Many scientists immediately protested. They said that the experiment was too foolish and that there was no hope of success. They claimed that no living organ had ever endured freezing and unfreezing. However, three Japanese scientists had in fact successfully frozen the brain of a cat for 203 days, unfrozen it and examined it. They discovered that the electric currents in the brain were similar to those of the cat before it was frozen. And the brain is considered the most delicate of all organs, unable to live without oxygen.