which one 與 which的區別：
如果後面是對單數的可數名詞的選擇，則which和which one都可以。
例如：（） is better?The girl or the boy? 兩者均可。
如果後面的選擇範圍不是單數的可數名詞，而是復數的可數名詞或不可數名詞，則不能用which one，只能用which。
which one 是 which的擴展詞組, 屬於which的用法之壹。
which one用於同類性質事物之間提問。
5. which one 意思是哪壹個 ，壹定是單數。
例句:
(1) Which one of you is Mr. Wang?
妳們中間哪壹位是王先生？
(2) You have only to tell me which one you want to choose.
妳只需告訴我妳要選哪個。
6.which 意思是哪個;哪壹個;哪壹些, 可以是單數,也可以是復數。
例句
(1) which 加單數
Which is more important, health or wealth?
健康和財富，哪個更重要？
(2) which 加復數
Which are the ones you really like?
知識點：which one只能代替可數名詞單數，which單數復數都可以代替。
1、which one?
讀音：英[hwit? w?n] 美[hw?t? w?n]
釋義 ：哪壹個;
例句：Show me which one you like and I'll buy it for you.
翻譯：指給我看妳喜歡哪個，我給妳買。
2、which?
讀音：英[w?t?] 美[hw?t?,w?t?]
釋義：1.pron. 哪個; 哪壹個; 哪壹些; 那，指前面提到的事物;
2.adj. 哪壹個; 哪壹些;
例句：Which do they want me to do? declare war or surrender?
翻譯：他們想讓我做什麽，宣戰還是投降？