【简答题】【消耗次数:1】
设 A = {1, 2=,2, 4=,3, 3=},B = {1, 3=,2, 4=,4, 2=},则对称差关系A⊕B等于:[填空1]
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相关题目
【简答题】 设 A = {1, 2=,2, 4=,3, 3=},B = {1, 3=,2, 4=,4, 2=},则交关系A∩B等于:[填空1]
【简答题】 设 A = {1, 2=,2, 4=,3, 3=},B = {1, 3=,2, 4=,4, 2=},则交关系A∩B的值域ran(A∩B)等于:[填空1]
【简答题】 设 A = {1, 2=,2, 4=,3, 3=},B = {1, 3=,2, 4=,4, 2=},则并关系A∪B的定义域dom(A∪B)等于:[填空1]
【判断题】 设 A = {1, 2=,2, 4=,3, 3=},B = {1, 3=,2, 4=,4, 2=},则并关系A∪B的定义域dom(A∪B)等于:{1,2,3,4}。
①  正确
②  错误
【简答题】 设 A = {1, 2=,2, 4=,3, 3=},B = {1, 3=,2, 4=,4, 2=},则求差关系A-B。
【简答题】 设 A = {1, 2=,2, 4=,3, 3=},B = {1, 3=,2, 4=,4, 2=},求交关系A∩B的值域ran(A∩B)。
【单选题】 设 A = {1, 22, 43, 3},B = {1, 32, 44, 2},则对称差关系A⊕B等于:
①  {1,21,32,43,34,2
②  {2,4
③  {1,21,33,34,2
④  {1,23,3}.
【简答题】 设 A = {1, 2=,2, 4=,3, 3=},B = {1, 3=,2, 4=,4, 2=},求差关系A-B的域fld(A-B)。
【简答题】 设 A = {1, 2=,2, 4=,3, 3=},B = {1, 3=,2, 4=,4, 2=},求并关系A∪B的定义域dom(A∪B)。
【单选题】 设 A = {1, 22, 43, 3},B = {1, 32, 44, 2},则差关系A-B等于:
①  {1,21,32,43,34,2
②  {2,4
③  {1,21,33,34,2
④  {1,23,3}.
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【单选题】 Mywalletisnowheretobefound.I________whenIwasonthebus.
①  musthavedroppedit
②  mustdropit
③  shouldhavedroppedit
④  oughttohavedroppedit
【单选题】 Ihavetwofriendsbut________ofthemlikestogofishingwithme
①  none
②  neither
③  both
④  either
【单选题】 Susan is not very intelligent, ________ work very hard.
①  not does she
②  neither does she
③  or does she
④  either does she
【单选题】 Allthings________,theplannedtriphadtobecalledoff.
①  considered
②  beconsidered
③  considering
④  havingconsidered
【单选题】 Mrs. White became a teacher in 1985. She ________ for twenty years by next summer.
①  willteach
②  wouldhavetaught
③  hasbeenteaching
④  willhavebeenteaching
【单选题】 Theteacher,aswellasallhisstudents,________bythedancer’sperformance.
①  wasimpressed
②  wereimpressed
③  impressed
④  .hadimpressed
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①  havefinished
②  willhavefinished
③  willfinish
④  finish
【单选题】 It was in the countryside ________ I spent my childhood.
①  where
②  place
③  when
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①  cancelled
②  had cancelled
③  had been cancelled
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【单选题】 A country ________ birth rate is higher than its death rate will have an increasing population.
①  who
②  which
③  whose
④  where