问题 阅读理解

阅读理解。

     Tim Richter and his wife, Linda, had taught for over 30 years near Buffalo, New York-he

in computers, she in special education."Teaching means everything to us." Tim would say.In

April 1998, he learned he would need a heart operation.It was the kind of news that leads to

some serious thinking about life's purpose.

     Not long after the surgery, Tim saw a brochure describing Imagination Library, a program

started by Dolly Parton's foundation (基金会) that mailed a book every month to children

from birth to age five in the singer's hometown of Sevier, Tennessee."I thought, maybe Linda

and I could do something like this when we retire." Tim recalls.He placed the brochure on

his desk as a reminder.

Five years later, now retired and with that brochure still on the desk, Tim clicked on

imaginationlibrary.com.The program had been opened up to partners who could take

advantage of book and postage discounts.

     The quality of the books was of great concern to the Richters.Rather than sign up

online, they went to Dollywood for a looksee."We didn't want to give the children rubbish."

says Linda.The books-reviewed each year by teachers, literacy specialists, and Dollywood

board members-included classics such as Ezra Jack Keats's The Snowy Day and newer

books like Anna Dewdney's Llama Llama series.

     Satisfied, the couple set up the Richter Family Foundation and got to work.Since 2004,

they have shipped more than 12,200 books to preschoolers in their area.Megan Williams,

a mother of four, is more than appreciative:"This program introduces us to books I've

never heard of."

     The Richters spend about $400 a month sending books to 200 children."Some people

sit there and wait to die." says Tim."Others get as busy as they can in the time they have left."

1.What led Tim to think seriously about the meaning of life?

A.His health problem.

B.His love for teaching.

C.The influence of his wife.

D.The news from the Web.

2.What did Tim want to do after learning about Imagination Library?

A.Give out brochures.

B.Do something similar.

C.Write books for children.

D.Retire from being a teacher.

3.According to the text, Dolly Parton is ________.

A.a wellknown surgeon

B.a mother of a fouryearold

C.a singer born in Tennessee

D.a computer programmer

4.Why did the Richters go to Dollywood?

A.To avoid signing up online.

B.To meet Dollywood board members.

C.To make sure the books were the newest.

D.To see if the books were of good quality.

答案

1-4ABCD

阅读理解与欣赏

       ①野生物种对人类农业的发展具有重要意义。在地球上的20万~30万种植物中,大约有1/3是可吃的,其中为人类品尝过的仅3000余种,而目前占世界食物消费量90%的植物却不到20种。因此,保持野生植物的多样性对于开辟人类食物新来源,改善食物营养结构以及增加食物的色香味都有着极大的意义。

       ②人类现有的农业也须臾离不开野生植物。今天的农作物,如小麦、玉米、水稻、大豆等,都是人类对原始野生植物物种进行长期驯化、筛选、培育而取得的成果,它们的产量比野生近亲的要高得多。然而,一种优质高产作物在经过几年至几十年的自繁后,其丰产性、抗病性会自行下降。因此,需要不断地通过杂交从其野生近亲吸取新的基因,以调整其遗传结构,从而保持或提高他们的优良性状。美国和加拿大是世界上两个主要的农业出口国,它们保持粮食高产的秘诀就在于经常利用野生植物的种质来改良作物品种。这两个国家的绝大部分粮食作物都是从外国引进的,由于在当地缺乏野生近亲植株,遗传学家不得不经常到墨西哥原始森林去寻找所需的基因源。而地球上野生物种的减少无疑将威胁到未来农业生产率的提高。据美国农业部估计,美国农业生产每年因采用遗传技术而增加的产值大约为10亿美元。可见,野生物种的基因世界里蕴藏着巨大的财富。

       ③大自然的生物基因库对于人类未来的农业革命有着重要意义。在墨西哥热带森林里有一种多年生的野生小麦,它的发现引起了遗传学家的极大兴趣。如果能将种野生小麦的基因与现有的驯化小麦基因适当地结合起来,则有可能培育出一种多年生的高产小麦新品种,从而改变人类千百年来传统的耕作方式,这不仅可以免除农民年复一年翻耕播种的麻烦,而且将大大节省人力和能源,降低粮食生产的成本。

1.找出选文的中心句,填写在下面。

                                                                                                              

2.选文主要从两个方面来说明中心,请用简洁语言把这两方面的内容概括出来。

(1)                                                            __    

(2)                                                                

3.说明事物应注意合理安排说明的顺序,选文采用的是                        顺序。从②③两段的内容看,它们之间的关系是                            关系。

4.选文第②段主要运用的说明方法除列数字外,还有                                                

5.用波浪线在原文中画出第③段中加黑的“这”所指代的具体内容。

                                                                                                                                       

6.画线句子中的“绝大部分”用与不用在表达效果上有什么差别?请简要说明。

                                                                                                                                       

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