what kind of noodles would you like?为什么用would而不是do

would like 为固定搭配.意为：想要.（用法与情态动词一样使用）
would like sth 想要.如：
I'd like an apple.
I would not like an apple,
Would you like an apple?
would like to do sth 想要做.如：
I would like to have an outgoing.
I would not like to play computer games.
Would you like to go to his birthday party?

也可以用do j借助助动词形成疑问句

在英语中，过去时态尤其是情态动词的过去时态是委婉，客气的语气的表达方式
eg：would、could、might....
would you like to hand me the book?
Could you help me?
What kind of noodles do you like?
语法正确，但是表达比较生硬，不客气，容易让人感觉不友好