就是what与which的区别。还有一个是what有纯名词性的，如：What he said is wrong.which只能是由一个疑问句变来的名词性从句。作为疑问代词what和which的区别是：后者给定选择的范围。前者不限。如：Which do you like eat, A or B?回答在A或B中选一个。What do you like to eat?回答是开放性的。两个词都可以作定语，后加名词如：Which book do you want to buy? What book do you want to buy? 问：什么叫纯名词性不带疑问性质的=名词+that-定语从句的。...
