DEDHAM — The trial of a Massachusetts man accused of abusing a dog so severely that it had to be euthanized is scheduled to get underway.Jury selection in Radoslaw Czerkawski's trial on animal cruelty charges is expected to begin Tuesday in Norfolk County Superior Court in Dedham.The year-old pit bull mix was found in Quincy in 2013 with fractures, a stab wound and a split tongue.