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
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![]()
令
(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
由![]()
綜上得a>3.…………………………14分
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。
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