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3．條件，條件：，則的（    ）．

A．充分不必要條件    B．必要不充分條件 

C．充要條件          D．既不充分也不必要條件

A．    B．    C． 　 D．

2．如圖，某人向圓內投鏢，如果他每次都投入圓內，那么他投中正方形區域的概率為（   ）．

A．         B．        C．        D．

則的值為（     ）．

1．若方程的解集分別為，且，

13、①                                                                    

②                                                                    

③                                                                     

14、                                                                      

15、①                                                                     

②                                                                      

16、①                                 ②                                  

③                                ,                                    

④                                ,                                    

17、                                                                     

18、                                                                        

19、                                                                       

20、                                                                        

21、

懷化市2008年高三第一次模擬考試統一檢測試卷

懷化市2008年高三第一次模擬考試統一檢測試卷

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