有关sets of和a set of 下面还有

有关sets of和a set of 下面还有 I have two __ .A.set of keys B.set of key C.sets of keys D.sets of 一个英语疑问 a set of=?就问一句.a set of =sets of还是=set of 关于a set of和sets of这两个短语是否存在单数和复数的关系.These are ( )color pencils.应该填a set of 还是sets of,为什么? take six sets of exams这里的set怎么理解? crisp set和membership是什么意思?比如在这样的语境里：Fuzzy logic control is based on fuzzy set theory[6].A fuzzy set is an extension of a crisp set.Crisp sets allow only full membership or no membership at all.whereas fuzzy sets allow 急i just can't stand him any more.he is so easy to get angry.even a little piece of friendly advice sets him off.请问下这里的set him off set off 有哪些意思、 a set of a set of The news______(激起)a rush of activity.我认为填sets off,是错的,正确答案是set off A set of 和 a part of的区别是什么? 两串钥匙是two set of keys还是two sets of keys 两串钥匙是two set of keys还是two sets of keys,哪个对?为什么? 是Some set of keys.还是Some sets of keys.(⊙o⊙)? a complex set of 具体 complex set a set of是什么意思啊? set a record of造句 a set of译成英语