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
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
24. _______ worried her a bit that he couldn’t get in touch with her friend
A. This B. That C. It D. What
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
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
第一节 单项填空(共15小题;每小题1分,满分15分)
从A、B、C、D四个选项中,选出可以填入空白处的最佳选项。
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
22.解:(1)………………….1分
由题意得,……………….2分
经检验满足条件。…………………………………….3分
(2)由(1)知
令(舍去)………………4分
当x变化时,的变化情况如下表:
x |
-1 |
(-1,0) |
0 |
(0,1) |
1 |
|
|
- |
0 |
+ |
|
|
-1 |
↘ |
-4 |
↗ |
-3 |
…………………………6分
∵关于x的方程上恰有两个不同的实数根,
……………………8分
(3)由题意得,
………………9分
①若单调递减。
∴当
②当a>0时随x的变化情况如下表:
x |
|
|
(,+) |
|
+ |
0 |
- |
|
↗ |
|
↘ |
…………………………12分
由
综上得a>3.…………………………14分
22.(满分14分)已知函数
(1)若处取得极值,求实数a的值;
(2)在(1)的条件下,若关于x的方程上恰有两个不同的实数根,求实数m的取值范围;
(3)若存在,使得不等式成立,求实数a的取值范围。
湖北省互联网违法和不良信息举报平台 | 网上有害信息举报专区 | 电信诈骗举报专区 | 涉历史虚无主义有害信息举报专区 | 涉企侵权举报专区
违法和不良信息举报电话:027-86699610 举报邮箱:58377363@163.com