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A∪B=空集有几种情况 When was __founded It was founded in JULY 1921 A.the League B.the PARTY C.the PLA D.the PRC 对于两个集合,若A并B=A,A是已知的,那么B可不可能为空集? when was the PRC founded?it was founded on ____.A:july1,1921 B:october 1,1949 C:august 1,1927 D:may 1,1922 Trust me.I'll do that,we'll be together中文是什么意思 翻译 我最崇拜的人 孑孑然什么意思 孑然的“孑”怎么读 安塞腰鼓的100~150个字简介 he tried to( keep) this( thing) a secret( from) his parents.尤其是括号里的, sent Russian animal the space first into(.) is the ringging doorbell(.)连词成句 See you（ ）. 游孑吟诗句什么意思 打波浪线句孑意思 没有more healthy 怎么会有less healthy 如题,牛津词典中healthy 的比较级是healthier,但是怎么会有less healthy?i Less()(盐) in dishes makes you healthy. 求海子的名句谢谢啦! 谁知道些海子的名句 10句左右都要是名句 就是1首诗中的名句 a single 它与a card及single card有何区别? 当一个女孩说：“Decide to be single.当一个女孩在她的签名是“Decide to be single”.请大家站在女孩子的角度回答!最好是女的回答. 句孑中的冒号:是什意思? we don't stand a chance的歌词 I'll stand for your lunch,这句话怎么翻译比较得体? My dog runs fast 改为否定句 would you last a day like that? 如何解决同学之间的矛盾?150字中学作文 速快! 为什么是how'd you get that?而不是how did you get that?how'd=how would吗? 如何处理好同学关系300字作文.快. which country_____ the frist animal into space"有send,sent,seeding 选空 how do you do that怎么回答 问几个多音字血、倔、晕要两个音,麻烦把音打出来还要组词 五年级作文《我喜欢水》600字 I’m very sorry ______ the whole morning.I forgot the appointment.A) to keep you wait B) to have kept you waiting C) to keep you wait D) to keep you wait