3．条件，条件：，则的（    ）．

A．充分不必要条件    B．必要不充分条件 

C．充要条件          D．既不充分也不必要条件

A．    B．    C． 　 D．

2．如图，某人向圆内投镖，如果他每次都投入圆内，那么他投中正方形区域的概率为（   ）．

A．         B．        C．        D．

则的值为（     ）．

1．若方程的解集分别为，且，

13、①                                                                    

②                                                                    

③                                                                     

14、                                                                      

15、①                                                                     

②                                                                      

16、①                                 ②                                  

③                                ,                                    

④                                ,                                    

17、                                                                     

18、                                                                        

19、                                                                       

20、                                                                        

21、

怀化市2008年高三第一次模拟考试统一检测试卷

怀化市2008年高三第一次模拟考试统一检测试卷

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