theonlyon和onlyone在定语从句中的区别是不是这样的eg：HeisonlyoneofthestudentswhoarestudyingHeistheonlyoneofthestudentswhoisstudying

　　theonlyon和onlyone在定语从句中的区别

　　是不是这样的

　　eg：Heisonlyoneofthestudentswhoarestudying

　　Heistheonlyoneofthestudentswhoisstudying