26. Instead, it seems that creative thinking is a (n) of habits.
A. affair B. business C. matter D. problem
25. by the beauty of the countryside, the old couple decided to stay another week on the farm.
A. Being attracted B. Attracted
C. To be attracted D. Having attracted
24. --I failed in the driving test.
--Don't be so disappointed. , you'll have one more chance of trying it.
A. At all B. After all C. In all D. Above all
23. From this day , I will be more careful when crossing the street.
A. onwards B. backwards C. afterwards D. forwards
22. money, people usually tend to spend more than they have to.
A. In the eyes of B. Regardless of C. In terms of D. In place of
第一节 语法和词汇知识(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. By the year 1889, there were just 541 bison in the whole of North America.
A. leaving alive B. to leave alive C. to be left alive D. left alive
22.(本小题满分10分)已知函数在处取得极值,其中为常数.
(1)求的值;
(2)讨论函数的单调区间;
(3)若对任意,不等式恒成立,求的取值范围.
21.(本小题满分9分)如图,已知⊙与⊙外
切于点,是两圆的外公切线,,为切
点,与 的延长线相交于点,延长
交⊙于 点,点在延长线上.
(1)求证:是直角三角形;
(2)若,试判断与能否一定垂直?并说明理由.
(3)在(2)的条件下,若,,求的值.
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