【判断题】【消耗次数:1】
若A={1,2,3},R={2,2},则R是自反的。
正确
错误
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相关题目
【判断题】 若A={1,2,3},R={2,2},则R是反自反的。
①  正确
②  错误
【判断题】 若A={1,2,3},R={2,2},则R是传递的。
①  正确
②  错误
【判断题】 若A={1,2,3},R={2,2},则R是对称的。
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【判断题】 若A={1,2,3},R={1,2},则R反自反。
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【判断题】 若A={1,2,3},R={1,2},则R反对称。
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【判断题】 若A={1,2,3},R={1,2},则R不具有传递性。
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【单选题】 设集合A={1,2,3},下列关系R中不是等价关系的是(   )
①  R={1,12,23,3}
②  R={1,12,23,33,22,3}
③  R={1,12,23,31,2}
④  R={1,12,23,31,22,11,33,12,33,2}
【单选题】 设 R={0,10,20,31,21,32,3},则{1,2}在关系R下的像R[{1,2}]等于:
①  {0,20,31,3
②  {1,02,03,02,13,13,2
③  {0,10,20,31,21,3
④  {2,3}.
【判断题】 调度r1(A); r2(A); r3(B); w1(A); r2(C); r2(B); w2(B); w1(C);是冲突可串行化的。
①  正确
②  错误
随机题目
【单选题】 People at the party worried about him, because no one was aware ______ he had gone.
①  of where
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【单选题】 If you drink too much, your health will get even ____.
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