问题 问答题 论述题

阐述引种的工作环节。

答案

参考答案:

(1)制定引种计划,搜集引种材料。

①选择现有栽培品种,引用特性接近的材料;

②引进特定的遗传种质,可不考虑生态条件的相近和气候的地区界限。

(2)检疫引种材料。

①严格检疫、检验和监督处理引进和输出的植物及其产品的疫病、害虫、杂草等有害生物;

②设检疫圃,鉴定新引材料,根除病虫杂草等。

(3)选择引种材料。选择途径:去杂去劣——混合选择(优株混脱、繁殖、参试)——单株选择(选优株,分脱、繁,按系统育种)。

(4)引种试验。

①观察试验:观察、鉴定引进种的适应性和价值;

②品种比较、区域试验:比较鉴定表现优良的引进品种,优异的参加区域试验,测定适应范围;

③栽培试验:确定引进品种,根据其遗传特性进行栽培试验,做到良种良法配套。

完形填空

第二节:完形填空(共20小题;每小题1.5分,满分30分)

Learning values and character at home is as important as any schoolwork. We all hope that the very values  36  are important to each of us are 37  along to our children. Often,  38 , that hope is challenged by a great many of pop culture messages, peer pressure (同伴压力), and overscheduled lives.

In the real world of jobs and career, people are 39  by two standards: Their professional skills and their  40  abilities.  41  grade school, high school, and college can teach skills and proficiency, it’s  42  parents to teach children the characters that make for 43  in the real world—a cooperative attitude,  44 , optimism and honesty. So take the work  45 . Send your kids into the world ready to  46  not only the tasks of life but its difficulties with character.

You really can’t start soon enough.  47 , children need personal integrity (个人操守) and morals as much as any adult.  48  the 5 to 10 most important messages you want your children to truly understand. Then think through  49  to teach these lessons. Talking to your kids should be only  50  of the plan. Letting them  51  honesty in action—through your own behaviour, by 52  films about great people together, or even by visiting a courtroom—is the  53  way to pass the message.

By identifying the specific  54  you would like to see in your children, you’re more likely to  55   those characters. So make a point of it.

36. A. which                B. that               C. who             D.  /

37. A. handed                 B. given                C. belonged         D. passed

38. A. therefore              B. however            C. thus            D. besides

39. A. chosen                     B. divided            C. selected        D. judged

40. A. personal               B. outstanding         C. collective         D. genetic

41. A. While                B. When               C. Until           D. Unless

42. A. for                       B. to                C. on to           D. up to 

43. A. work                      B. success             C. grow           D. maturity

44. A. depression            B. encouragement       C. creativity       D. desertion

45. A. quickly                    B. eventually           C. seriously      D. obviously

46. A. face                      B. achieve              C. make              D. handle

47. A. First of all           B. After all             C. In all               D. All in all

48. A. Work out            B. Go over             C. Write down     D. Get through

49. A. how                  B. what               C. where         D. why

50. A. root                B. base                C. all            D. part

51. A. witness              B. stare                  C. gaze         D. scan

52. A. reading                    B. scanning            C. watching     D. examining

53. A. easiest                     B. strongest            C. cruelest        D. simplest

54. A. problems            B. manners            C. wonders       D. characters

55. A. strengthen           B. forget              C. remind            D. tear

名词解释