A 114-year-old Los Angeles woman has become the oldest person in the world, hospital sources said on Saturday.      Gertrude Baines, a resident of a nursing home, assumed that title when a 115-year-old woman in Portugal died Friday.      Baines was born in 1894 when Grover Cleveland was . president. Her parents were both slaves as children.    据医院方面说，洛杉矶的格楚德 贝恩斯成为了世界上年龄*的人。现居住于一家疗养院的格楚德是在上周葡萄牙的一位115岁的妇女去世后得到这个头衔的。她于1894年，克利夫兰当总统的时候出生。她的父母小的时候还当过奴隶。