有关sets of和a set of 下面还有

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a set of表示一套……,一系列……,所以后面用名词复数,sets of 和它是同义词组,所以后面也用名词复数,就相当于a lot of=lots of追问：
用法也一样吗回答：
在复杂点就是set of 还有各种各样,许多种类的意思,如果主语是there is就用a set of,如果是there are就用sets of

有关sets of和a set of 下面还有关于a set of和sets of I have two __ .A.set of keys B.set of key C.sets of keys D.s set和a set of的区别还有I have a set of (key). take six sets of exams这里的set怎么理解? a set of a common set of A set of keys a pair of和a set of的区别 A set of 和 a part of的区别是什么? 是Some set of keys.还是Some sets of keys.(⊙o⊙)?