"that" and "which"

剛在AUE上看到的:
That and Which

討論串裏頭有人提到這個link:
http://grammar.ccc.commnet.edu/grammar/notorious/that.htm 
這link裡頭又提到:
http://www.worldwidewords.org/articles/which.htm
注意裡頭的:
"...... Here are some instances, but don’t take them as a full list of cases, and they are tendencies, not full-blown rules: "
其它的就請自己慢慢閱讀吧
對了,我自己再補上這個:
http://alt-usage-english.org/excerpts/fxthatvs.html