如何区别宾语从句中that,which,who,whom,if,whether的用法?答:由as, which 引导的非限定性定语从句,as和which可代整个主句,相当于and this或and that。As一般放在句首,which在句中。 As we know, smoking is harmful to one's health. The sun heats the earth, which is very important to us. as可引导非限制性从句,常带有'正如'的意思。 As is know, smoking ...