英语定语从句和同位语从句一道很容易做错的题目求解释!WhatwewantisanenvironmentallyfriendlycarWhatwewantisanenvironmentallyfriendlycar,especially____isgoodongas.AonewhichBonethatCwhich做同位语时one

　　英语定语从句和同位语从句一道很容易做错的题目求解释!Whatwewantisanenvironmentallyfriendlycar

　　Whatwewantisanenvironmentallyfriendlycar,especially____isgoodongas.

　　AonewhichBonethatCwhich

　　做同位语时one后面跟which毫无疑问,只不过是子啊同从后面加了一个定从.但是吧这个句子完全理解成定于从句.which指代前文的anenvironmentallyfriendlycar为什么不可以?

　　额额==one后面接that搞错==