欧美日韩黄网欧美日韩日B片|二区无码视频网站|欧美AAAA小视频|久久99爱视频播放|日本久久成人免费视频|性交黄色毛片特黄色性交毛片|91久久伊人日韩插穴|国产三级A片电影网站|亚州无码成人激情视频|国产又黄又粗又猛又爽的

 0  424070  424078  424084  424088  424094  424096  424100  424106  424108  424114  424120  424124  424126  424130  424136  424138  424144  424148  424150  424154  424156  424160  424162  424164  424165  424166  424168  424169  424170  424172  424174  424178  424180  424184  424186  424190  424196  424198  424204  424208  424210  424214  424220  424226  424228  424234  424238  424240  424246  424250  424256  424264  447090 

26. _______ David says sounds right to Helen. That’s why she has made up her mind to live with him _______ happens.

A. Whatever; whatever                   B. No matter what; whatever

C. No matter what; No matter what         D. Whatever; however

試題詳情

25. ----Many a student _______ visited the great wall.

----Yes, they each _______ their own opinion of it.

A. had, has                B. have, had       C. have, has    D. has, have

試題詳情

24. _______ worried her a bit that he couldn’t get in touch with her friend

A. This                B. That           C. It           D. What

試題詳情

23. ---- Are there any apples in the bag?    

----  _______. In fact, there is _______ in it.

A. Nothing, nothing     B. None, none      C. None, nothing       D. No one, nothing

試題詳情

22. Just because they make more money than I do, _______ they seem to look down on me.

A. so                      B. and                C. but          D. 不填

試題詳情

第一節(jié) 單項填空(共15小題;每小題1分,滿分15分)

從A、B、C、D四個選項中,選出可以填入空白處的最佳選項。

21. He suggested the problem worth paying attention _______ at the meeting.

A. to be discussed           B. to discussing      C. to discuss        D. to being discussed

試題詳情

22.解:(1)………………….1分

由題意得,……………….2分

經(jīng)檢驗滿足條件!.3分

(2)由(1)知

(舍去)………………4分

當x變化時,的變化情況如下表:

x
-1
(-1,0)
0
(0,1)
1

 

0
+
 

-1

-4

-3

…………………………6分

∵關(guān)于x的方程上恰有兩個不同的實數(shù)根,

……………………8分

(3)由題意得,

………………9分

①若單調(diào)遞減。

∴當

②當a>0時隨x的變化情況如下表:

x


(,+)

+
0
-




…………………………12分

綜上得a>3.…………………………14分

試題詳情

22.(滿分14分)已知函數(shù)

  (1)若處取得極值,求實數(shù)a的值;

  (2)在(1)的條件下,若關(guān)于x的方程上恰有兩個不同的實數(shù)根,求實數(shù)m的取值范圍;

  (3)若存在,使得不等式成立,求實數(shù)a的取值范圍。

試題詳情


同步練習冊答案