福州市2016—2017学年第一学期九年级期末质量检查数学试卷参考答案及评分标准一、选择题（每小题4分，共40分）1．C2．A3．D4．B5．D6．D7．B8．A9．C10．A二、填空题（每小题4分，共24分）11．（0，1）12．3213．点P在⊙O上14．221（或10.5）15．216．m≥1三、解答题(满分86分)17．解：2221336xx，···················································································3分8)3(2x，······································································································4分223x，····································································································6分∴3221x，3222x．·············································································8分18．解： 141)1(2mx有两个不相等的实数根，∴141m＞0．····································································································5分解得m＞4．········································································································8分19．解：如图所示．··································································································3分由旋转得45CBE，BEBC1．······································································4分 △ABC中90C，CACB1，∴45CABCBA，21122AB．··························································6分∴CBECBA．∴A，B，E三点共线．··························································································7分∴21BEABAE．····················································································8分ABCDE20．解：（1）0（或1）；·····························································································2分（2）列树状图如下：·····························5分由树状图可知，所有可能出现的结果共12种情况，并且每种情况出现的可能性相等．其中摸出两枚棋子的颜色相同(记为事件A)的结果有4种，即（黑1，黑2)，（黑2，黑1)，（白1，白2)，（白2，白1)．······································6分∴P(A)=124=31＜21．(或证明31≠32也可以)····························································7分∴“摸出两枚棋子的颜色相同”与“摸出两枚棋子的颜色不同”的概率不相等...