在四棱台abcd A1b1c1d1中上下底面均为正方形则dd1与bb1所在直线是 A.相交直线 B.平行直线 C 不垂直的异面 Template




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tomski在四棱台abcd a1b1c1d1中上下底面均为正方形则dd1与bb1所在直线是 a.相交直线 coloring