一个英语疑问 a set of=?就问一句.a set of =sets of还是=set of
问题描述：
一个英语疑问 a set of=?
就问一句.a set of =sets of
还是=set of
答
a set of = sets of
一个英语疑问 a set of=?
就问一句.a set of =sets of
还是=set of
a set of = sets of