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集合A={1,2,…,10}上的关系R={|x+y=10,x,y A}，则R 的性质为（ ）。
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集合A={1,2,…,10}上的关系R={|x+y=10,x,y A}，则R 的性质为（ ）。
A、自反的
B、对称的
C、传递的，对称的
D、传递的
时间：2021-09-01 20:46
关键词：
联大
河南理工大学
计算机科学与技术
离散数学
答案解析
B
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