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.