试题题干
A(n)
may consist of a single root morpheme as in iron or of two root morphemes as in a compound like handcuff.
参考答案
试题解析
本题考查词干。
A stem may consist of a single root morpheme as in iron or of two root morphemes as in a compound like handcuff.
一个词干可能由单个词根词素组成，如在iron（铁，铁制品）中；也可以由两个词根词素所组成，如在复合词handcuff（手铐）中。
故答案为stem。