This is the tiger (that\which) has ever been shown in the zoo.
解释一下的话,这是用that\which引导的定语从句,句中缺主语,
that既可指人又可指物、which只用来指物.此处先行词tiger是物、所以that\which均可tiger是动物，属于物吗是滴~tiger是老虎的意思、所以是物的说- -o ,