题目

圆x2+y2﹣4x﹣4y﹣8=0的圆心坐标为_____,半径为_____. 答案:【答案】(2,2) 4 【解析】配方后可得圆心坐标和半径.圆x2+y2﹣4x﹣4y﹣8=0,即 (x﹣2)2+(y﹣2)2=16,故它的圆心坐标为(2,2),半径为4,故答案为:(2,2);4.I’m not used to the way you speak to me. __________, I don’t want to continue the conversation.A.In wordB.At allC.In other wordsD.In another words
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