Question

what which的用法区别

Answer 1

关于what和which的用法区别：

What is used to ask a question which has a lot of possible answers. 

what用于表示有很多种潜在答案的疑问句中。

Consider the question: 

想想这个问题：

What do you want to eat for lunch? 

你中午想吃什么？

Here, there are no choices to limit your reply. You could choose anything you want.

看吧，这个问题的答案是没有限制的，你可以回答任意想吃的东西。

We use which when we have options to choose from. 

which用于选择性疑问句中。

So, here we have two choices- a sandwich and a melon.  

那么我们有两个选择——一个三明治和一个甜瓜。

So I can say: 

我可以说：

Which do you want to eat? The sandwich or the melon?

三明治和甜瓜，你想吃哪个？