24. While he was investigating ways to improve the telescope, Newton made ________ discovery which completely changed ________ man’s understanding of color.
A. a; 不填 B. a; the C. 不填; the D. the; a
23. It is reported that the police will soon ________ the case of the two missing children.
A. look upon B. look after C. look into D. look out
22. Don’t be discouraged. ________ things as they are and you’ll enjoy every day of your life.
A. Taking B. To take C. Take D. Taken
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,并在答题卡上将该项涂黑。
21. -Waiter, ________?
-Wait a minute, sir. That’s $ 80 altogether.
A. would you charge me B. how much did we eat
C. may I have the bill, please? D. would you take the money
21. (本小题满分12分)
已知:函数是R上的单调函数,且
,对于任意
都有
成立.
(1)
求证:是奇函数;
(2)
若满足对任意实数
恒成立,求k的范围.
20. (本小题满分12分)
已知奇函数的反函数
的图象过点
.
(1)
求实数的值;
(2)
解关于x的不等式
19. (本小题满分12分)
已知二次函数,且
.
(1)
若函数与x轴的两个交点
之间的距离为2,求b的值;
(2)
若关于x的方程的两个实数根分别在区间
内,求b的取值范围.
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