问题 问答题 简答题

简述教材中石灰岩采用的结构-成因分类 。

答案

参考答案:

根据结构组分的类型及其相对含量把石灰岩分成三大类:即,Ⅰ颗粒-灰泥石灰岩,Ⅱ晶粒石灰岩,Ⅲ生物格架-礁石灰岩。又根据灰泥含量和颗粒含量,Ⅰ类岩石又分为颗粒石灰岩(其分为三种,颗粒石灰岩、含灰泥颗粒石灰岩和和灰泥质颗粒石灰岩),颗粒质石灰岩、含颗粒石灰岩和元颗粒石灰岩,根据颗粒的种类,可以继续划分,颗粒主要是内碎屑、生物颗粒、鲕粒、球粒、藻粒这五种。

填空题
完形填空

第三节 完形填空:(共20小题,每小题1.5分,满分30分)

阅读下面短文,掌握其大意,然后从21-40各题所给的四个选项(A、B、C和D)中,选出最佳选项。

A young student was one day taking a walk with a professor, who was commonly    21    the students’ friend. As they went    22     , they saw lying in the path a pair of old    23    , which they supposed to belong to a poor man who was employed in a   24    close by. The student saying, “Let’s play the man a   25   : We will hide his shoes, and 26   ourselves behind those bushes, and wait to see his   27    when he cannot find them.”

“ My young friend,” answered the professor, “we should never   28    ourselves at the   29    of the poor. But you are   30  , and may give yourself a much greater   31    the poor man. Put a coin into each shoe, and then we will hide ourselves and   32    how the discovery affects him.” The student did so, and they both placed themselves behind the bushes. The poor man soon finished his work, and came   33   the field to the path   34    he had left his coat and shoes. While   35    his coat he slipped his foot into one of his shoes; but feeling   36  , he stopped down to feel    37    it was, and found the coin. Astonishment and wonder were seen upon his face. He now put the money into his pocket, but his  38    was doubled on finding the other coin. He fell upon his knees, looked up to heaven and uttered aloud a fervent(热烈的)thanksgiving, in which he   39    his wife, sick and helpless, and his children without bread. The student stood there deeply   40   , and his eyes filled with tears.

21. A. held                   B. kept                         C. named                  D. called

22. A. along              B. on                           C. over                         D. back

23. A. socks           B. gloves                  C. shoes                   D. trousers

24. A. field                   B. factory                        C. company              D. shop

25. A. game              B. trick                        C. joke                         D. word

26. A. hide                   B. have                    C. let                           D. make

27. A. excitement      B. sorrow                        C. disappointment     D. anxiety

28. A. make              B. treat                     C. amuse                  D. laugh

29. A. price              B. expense                C. value                   D. pay

30. A. poor               B. kind                     C. honest                  D. rich

31. A. pleasure              B. money                        C. thought                    D. benefit

32. A. notice             B. watch                   C. realize                  D. find

33. A. about              B. across                  C. into                         D. by

34. A. where             B. that                          C. there                    D. which

35. A. wearing on      B. dressing up           C. putting on            D. pulling in

36. A. soft                    B. terrible                        C. strange                     D. hard

37. A. what               B. how                         C. whether                D. why

38. A. confidence      B. embarrassment          C. surprise                D. joy

39. A. mentioned       B. remembered         C. recommended       D. Reminded

40. A. amazed           B. defeated               C. puzzled                    D. affected