来自田荣华的问题
setlanguageandnotation(数学语言和符号）拜托了各位UnionofAandBIntersectionofAandBnumberofelementinsetA"...isanelementof…”complementofATheemptysetuniversalsetAisaofBAisapropersubsetofBAisno
setlanguageandnotation(数学语言和符号）拜托了各位
UnionofAandBIntersectionofAandBnumberofelementinsetA"...isanelementof…”complementofATheemptysetuniversalsetAisaofBAisapropersubsetofBAisnotasubsetofAisnotapropersubsetofB
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2020-04-28 22:20