how to do,how to do it,what to do 有何区别?

how to do it what to do的区别 how to do it和how to do区别 what to do和how to do it有什么区别? how to do it? how to do it next还是what to do next 关于what to do ,how to do it. 关于how to do it what to do what to do和how to do it 请问how to do与what to do的区别 how to do和what to do的区别 what to do 与how to do 的区别 WHAT TO DO=HOW TO DO