非限定性定语从句的which is可以省略吗
an education that aims at getting a student a certain kind of job is a technical education, justified for reasons radically different from why education is universally required by law.
可以这么理解；但在这里应该是分词作伴随状况，因为非限定性定语从
表次要信息，而justified for----是主要信息；非限定性定语从句一般不能省略掉which is，因为省略掉就反映不出结构的主次关系了。
在定语从句中which is 经常可以省略，拿什么情况下which is 一定不能省略呢
所有的现在分词或过去分词在跟在一个名词后修饰该名词的时候,这其实都是一个省略了which is 的定语从句,从句中是系表结构（系词be等 + 表语）,这中情况下的which is都能省略,不管是主语还是宾语还是鸟语
如：
This is the book (which is) lost. 这是那本丢掉的书.
This is the book (which is) written by Lu Xun. 这是鲁迅写的书.
It's a historical moment (which is) exciting everybody.这是一个让大家都兴奋起来的历史性时刻.
但是如果which is 后面不是形容词,那就不能省,哪怕先行词是宾语.如：
Jenny is reading a book which is her birthday gift.
Jenny看的那本书是她的生日礼物. 这里book是宾语,which is 能省吗?
套公式不可怕,可怕的是套错了.
望采纳，O(∩_∩)O谢谢
定语从句中的连词what和which有什么区别
定语从句：指人时常用which 和 who 而 what 则常用于指物名词性从句分为：主语从句,宾语从句,同位语从句和表语从句.what可以引导名词性从句,在从句中可做主语、宾语、表语.which是关系代词,引导定语从句,在从句中可充当主语、宾语、表语.引导定语从句的词分为关系代词（which,that,who,whom,whose,as）关系副词（when,where,why）,注意：没有what.如：1.This is the book which I talked about yeasterday.(which引导定语从句放在名词book后面起修饰作用,which在从句中充当talk about的宾语)2.This book is what I talked about yesterday.(what引导名词性从句,放在is之后,what 在表语从句（名词性从句）充当talked about的宾语.)that可以指人,也可以指物；which只能指物 2.当先行词是不定代词all,something,anything,everything,none,the one等时,只能用that3.先行词前有形容词的最高修饰时,要用that4.先行词前有序数词修饰时,要用that5.先行词前有形容词only,very,few,little等修饰时,要用that6.先行词既指人,又指物时,只能用that7.在非限制性定语从句中,只能用which8.在介词+关系代词引导的定语从句中,必须用which9.当先行词本身是that的时候,要用which
