which

1. (用于疑问句中)哪个，哪些
You use which in questions when there are two or more possible answers or alternatives.

e.g. Which do they want me to do? declare war or surrender?...
他们想让我做什么,宣战还是投降？
e.g. Which are the ones you really like?...
哪些是你们真正喜欢的？

2. (用于指明在两个或多个答案或选项中所作出的选择)哪个，哪些
You use which to refer to a choice between two or more possible answers or alternatives.

e.g. I wanted to know which school it was you went to...
我想知道你上的是哪所学校。
e.g. I can't remember which teachers I had...
我记不清哪些老师教过我。

3. (用于关系从句句首，具体说明所谈论的事物或提供关于它的更多信息)
You use which at the beginning of a relative clause when specifying the thing that you are talking about or when giving more information about it.

e.g. Soldiers opened fire on a car which failed to stop at an army checkpoint...
士兵向那辆拒绝在军事检查站停车检查的汽车开了火。
e.g. He's based in Banja Luka, which is the largest city in northern Bosnia...
他驻扎在波斯尼亚北部的最大城市巴尼亚卢卡。

4. (用来回指前面句子表达的观点或状况)这，那
You use which to refer back to an idea or situation expressed in a previous sentence or sentences, especially when you want to give your opinion about it.

which

e.g. They ran out of drink. Which actually didn't bother me because I wasn't drinking...
他们把酒喝完了。但实际上这对我来说无所谓，因为我不喝酒。
e.g. Since we started in September we have raised fifty thousand pounds, which is pretty good going...
我们自从9月份开始以来，已经募集到5万英镑，进展相当顺利。

5. 哪个是哪个(用于表示无法区分)
If you cannot tell the difference between two things, you can say that you do not know which is which .

which的意思

e.g. They all look so alike to me that I'm never sure which is which...
对我来说他们看起来全都非常相似，我永远搞不清哪个是哪个。
e.g. It's essential to know which is which as treatments will be quite different.
由于治疗的方法将会全然不同，因此弄清楚哪个是哪个很重要。

6. any which way -> see way
every which way -> see way

1.

1. 哪一个：提问可以用(5w+1H)做疑问词即什么(what),哪一个(which),何时(when),哪里(where),谁(who)和如何(how). 其它关键词包括:出示、解释、记录,多少、程度、达标率、情况等. 采用易被理解的语言;使用事先准备好的检查表;采取公开讨论的方式,

2. 哪些：议程设置最早的概念认为,一个议题在媒介的显著程度将决定它在公众心目中的重要程度. 不过,新发展已将其内涵扩展:不仅关注媒介强调了哪些(which)议题,而且关注这些议题怎样(how)表达.