九年级数学第二次质量调查试卷(二模)试卷VIP免费

二模数学参考答案一、选择题：DBBACCCD二、填空题：9、710、23yx11、24yx12、113、1214、10y15、103316、①②④三、解答题：17、26934(2)22mmmmmm=23223mmmmm............................................................................................3=3mm......................................................................................................................5解得：2m 2m∴2m............................................................................................6当2m时，原式23122.......................................................................818、证明：证出：CEAF........................................................................................2证出：90CEDAFB.................................................................4证出：ABFCDE................................................................................819、解：（1）9820%490（辆）答：略.......................................................................................................5（2）4901689813094（辆）.........................................................8补全统计图正确.......................................................................................1020、解：不公平.....................................................................................................................................................11012211211211211.................................................................4此事件共有12种等可能情况，其中小聪获胜共有5种情况：12，11，02，01，12，512P小聪胜..............................................................................................................................................8∴5711212P小明胜 PP小聪胜小明胜...................................................................................................................................9∴这个游戏不公平....................................................................................................................................1021、解：延长''AB交'OB于点C，过O作OPAB分别交'AC、AB于Q、P两点.......................1求得：6AP......................................................................................................................................3求得：''8ABABAPPB....................................................................................................4求得：'53AQ...............................................................................................................................6求得：'532AC..........................................................................................................................7求得：''''5328536BCACAB（米）.....................................................9答：略..................................................................................................................................................1022、解：（1）求得：A22，..............................................................................2求得：4yx.................................................................................4（2）求得：22B，...........................................................................5...