(1)Here is Beijing,where I grow up.where其实也是指代北京,不过where是在北京的意思,也就是 in Beijing (2)Here is Beijing,in which I grow up.其实which就是指代北京,也就是I grow up in which然后把in which提到了前面 (3)Here is Beijing,from which I come.这句也好懂了吧,就是I come from which,which就是Beijing.