A set of 和 a part of的区别是什么?

A set of 和 a part of的区别是什么? part of 和a part of有何区别? part of 和a part of有何区别? a part of them 和part of them哪个对 part of和a part of有什么区别? part of和a part of的区别? as a part of和as part of一样吗? part of 与 a part of全部的区别a part of 和 part of的区别,要全的, a set of a set of a part of the part of part of 区别 A small part of Part of 和a part of 和parts of的区别 a complex set of 具体 complex set 有关sets of和a set of 下面还有 a part of=a fraction of a set of是什么意思啊? set a record of造句