阅读下面程序:set_01 = {'a', 'c', 'b', 'a'}set_01.add('d')print(len(set_01))程序,以下输出结果正确的是( )。
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调用items()方法可以查看字典中的所有__________。
乳腺癌最常见的血液转移部位为
A. 肺脏
B. 脑
C. 肝脏
D. 骨
E. 颈部
SectionDDirections:Inthissection,youwillheararecordedshortpassage.Thepassageisprintedinthetestpaper,butwithsomewordsorphrasesmissing.Thepassagewillbereadthreetimes.Duringthesecondreading,youarerequiredtoputthemissingwordsorphrasesontheAnswerSheetinorderofthenumberedblanksaccordingtowhatyouhear.Thethirdreadingisforyoutocheckyourwriting.Nowthepassagewillbegin. Volunteersareourheartandsoul.Pleasecomeandhelpusbuildhomesfor__20__lowincomefamilies.Thereisnoexperienceneededandwesupplythe__21__.Justvolunteerforaday.It’sfun,rewardingandyoucanlearnsome__22__.Ifbuildingisn’tyourthing,comeandvolunteerforoneofoureventsor__23__.Youmustbe__24__14yearsofagetovolunteerandthose15yearsandundermustcomewithaparent.Comeandsignupnowtovolunteeryourtime.