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(2015秋?锦州校级期中)在△ABC中,角A,B,C的对应边分别为a,b,c,... 2014龙岩模拟正四棱锥
(2015?辽宁二模)已知U={1,2,3,4,5,6},M={1,3,4,5}。 (2015?辽宁二模)已知U={1,2,3,4,5,6},M={1,3,4,5},N={2,4,5,6},则()A.M∩N={4,6} B.M∪N=U C....
(2015?辽宁二模)已知U={1,2,3,4,5,6},M={1,3,4,5}。 (2015?辽宁二模)已知U={1,2,3,4,5,6},M={1,3,4,5},N={2,4,5,6},则()A.M∩N={4,6} B.M∪N=U C....