2. 计算机
  3. Which property does R possess? ( ) let A={1,2,3,4} and let R ={＜1,2＞,＜2,2＞,＜3,4＞,＜4,1＞,＜4,2＞}

Which property does R possess? ( ) let A={1,2,3,4} and let R ={＜1,2＞,＜2,2＞,＜3,4＞,＜4,1＞,＜4,2＞}

admin2009-07-15  16
问题 Which property does R possess? (    )     let A={1,2,3,4} and let R ={＜1,2＞,＜2,2＞,＜3,4＞,＜4,1＞,＜4,2＞}
选项 A、symmetry
B、antisymmetry
C、asymmetry
D、reflexivity
答案B
解析
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原NCRE全国计算机四级

NCRE全国计算机四级

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