题目

根据要求改写下列各句,每空一词。 1.She often plays soccer after school.(用now改写句子)   She _____________  _____________soccer now. 2.My grandfather is reading the newspaper.(就划线部分提问) __________is your grandfather ____________? 3.The white bag is nine dollars.(就划线部分提问)       ______________ ________________is the white bag? 4.Lucy cleaned her room yesterday.(改为否定句)   Lucy_________ ____________her room yesterday. 5.On Sunday night,I watched an exciting talk show.(就划线部分提问已知圆O以原点为圆心,且过A(22,1)(1)求圆O的方程;(2)求圆O关于直线x+y=2对称的圆的方程;(3)经过点P(3,1)且与圆O相切的直线方程(4)若直线x+2y+c=0与圆O相交所截得的弦长是1255,求c.
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