问题 综合

图为我国东南沿海某区域等高线图及沿BC剖面线的地质剖面图。读图,回答下列问题:(8分)

(1)字母A代表的地形部位名称是___________,其顶部与底部的高差至少在______m以上。

(2)沿剖面线BC的地质剖面图中①、②两处发育成河谷的原因是:____________________;

___________________。

(3)在河流③和④两处中:河流横断面呈“V”型的是______处,其成因是_______________。

河流横断面呈“U”型的是______处,其成因是____________________________________。

答案

(1)陡崖     50

(2)①处背斜顶部受张力,岩石破碎,易被侵蚀   ②处断层地带岩石破碎,易被侵蚀,沿断层线发育成河谷

(3)③     由于流水向下侵蚀切割河床,呈“V”型     ④ 由于流水沉积作用显著,呈“U”型

本题考查等高线地形图及地质剖面图的读图分析能力、地质构造与地表形态的关系等相关知识。解答时,应把握以下关键点:第(1)题,注意分析图中等高线的分布特征,并结合水系分布,分析该区域的地表形态特征。第(2)题,把握地质剖面图中岩层的弯曲变化状态,图中显示①处地下岩层向上拱起,是背斜构造,②处地下岩层存在一个断层构造。第(3)题,③位于河流上游,流水的下蚀为主,④位于河流下游,以流水沉积和侧蚀为主。

完形填空

When I come across a good article in reading newspapers. I often want to cut and keep it. But just as I am about to do so I find the article on the ___1___ side is as much interesting. It may be a discussion of the way to ___2___ in good health, or a ___3___ about how to behave and conduct oneself in society. If I cut the front article, the opposite one is likely to ___4___ damage, leaving out half of it or keeping the text ___5___ the title. Therefore, the scissors would ___6___ before they start, ___7___ halfway done when I find out the ___8___ result.

Sometimes two things are to be done at the same time, both worth you ___9___. You can only take up one of them, the other has to wait or be ___10___ up. But you know the future is unpredictable(不可预料) — the changed situation may not allow you to do what is left ___11___. Thus you are ___12___ in a difficult position and feel sad. How ___13___ that nice chances and brilliant ideas should gather around all at once? It may happen that your life ___14___ greatly on you preference of one choice to the other.

In fact that is what ___15___ is like, we are often ___16___ with the two opposite sides of a thing which are both desirable like a newspaper cutting. It often occurs that our attention is drawn to one thing only ___17___ we get into another. The ___18___ may be more important than the latter and give rise to a divided mind. I ___19___ remember a philosopher’s remarks, “When one door shuts, another opens in life.” So a casual(不经意) ___20___ may not be a bad one.

1. A. front      B. same   C. either  D. opposite

2. A. get  B. keep   C. lead    D. bring

3. A. advice    B. news   C. theory D. report

4. A. suffer     B. reduce C. prevent      D. cause

5. A. on   B. for      C. without      D. off

6. A. use  B. handle C. prepare      D. stay

7. A. or   B. but     C. so       D. for

8. A. satisfying       B. regretful     C. surprising   D. impossible

9. A. courage  B. strength      C. attention     D. patience

10. A. given    B. held    C. made  D. picked

11. A. near      B. alone  C. about  D. behind

12. A. filled    B. attracted     C. caught D. struck

13. A. dares    B. comes C. deals   D. does

14. A. improves     B. changes      C. progresses  D. goes

15. A. study    B. society       C. nature D. life

16. A. faced    B. supplied     C. connected   D. fixed

17. A. before  B. after   C. until   D. as

18. A. following     B. next    C. above  D. former

19. A. still      B. also    C. once   D. almost

20. A. treatment     B. action C. choice D. remark

单项选择题