a curve is a line _______ no part is straight and which has no angle

问题描述:

a curve is a line _______ no part is straight and which has no angle
怎么选的of which,请高手简单讲讲

介词+关系代词可引导定语从句.因为是短语“no part of which”因此用of which,而不用in which.Whose 和that在此都不符合语法结构.又如:This is the dictionary of which I bought yesterday.这是我昨天买的那本字典.