问题 解答题

黄河大口米由于光照充足、生长期长、加上使用黄河水灌溉,形成了独特的品质--晶莹透亮、粘度适中、甘醇清香、营养丰富,被世界卫生组织认定为“无公害食品”.请分析回答:

(1)东营属于温带大陆性气候,光照充足、生长期长、黄河水中的泥沙含有多种化学元素,有利于水稻的生长.可见,影响水稻生长的非生物因素有______.

(2)“稻花香里说丰年,听取蛙声一片”,请据此写出稻田生态系统中的一条食物链______.

(3)作为餐桌上的主食,大米的营养主要储存在水稻种植中的______中;完整的大米籽粒在结构层次属于______.

答案

(1)非生物因素包括:光、温度、水、空气、土壤等.生物因素是指环境中影响某种生物个体生活的其他所有生物,包括同种和不同种的生物个体.

(2)食物链是生产者和消费者之间吃与被吃的关系,起点是生产者,终点是消费者,箭头指向吃的一方,稻田中有稻(生产者)、虫、青蛙,三者的关系是虫吃稻,青蛙吃虫,所以食物链是稻→虫→青蛙.

(3)水稻是单子叶植物,其种子的结构包括种皮、胚和胚乳,其中胚乳的作用是储存营养;绿色开花植物有根、茎、叶、花、果实、种子六大器官,其中完整的大米籽粒属于果实.

故答案为:(1)温度、光照、水分、土壤(答出2项即可)

(2)水稻→害虫→青蛙

(3)胚乳;器官

阅读理解

阅读理解。

     Reading poems is not exactly an everyday activity for most people. In fact, many people never read

a poem once they get out of high school.

     It is worth reminding ourselves that this has not always been the case in America. In the nineteenth

century, a usual American activity was to sit around the fireside in the evening and read poems aloud.

It is true that there was no television at the time, nor movie theaters, nor World Wide Web, to provide

diversion. However, poems were a source of pleasure, of self-education, of connection to other people

or to the world beyond one's own community. Reading them was a social act as well as an individual

one, and perhaps even more social than individual. Writing poems to share with friends and relations

was, like reading poems by the fireside, another way in which poetry has a place in everyday life.

     How did things change? Why are most Americans no longer comfortable with poetry, and why do

most people today think that a poem has nothing to tell them and that they can do well without poems?

     There are, I believe, three factors: poets, teachers, and we ourselves. Of these, the least important is

the third: the world surrounding the poem has betrayed us more than we have betrayed the poem. Early

in the twentieth century, poetry in English headed into directions unfavorable to the reading of poetry.

Readers decided that poems were not for the fireside or the easy chair. at night, and that they belonged

where other difficult-to-read things belonged.

     Poets failed the reader, so did teachers. They want their students to know something about the skills

of a poem, they want their students to see that poems mean something. Yet what usually occurs when

teachers push these concerns on their high school students is that young people decide poems are

unpleasant crossword puzzles.

1. Reading poems is thought to be a social act in the nineteenth century because _____.

A. it built a link among people

B. it helped unite a community

C. it was a source of self-education

D. it was a source of pleasure

2. The underlined word "diversion" most probably means _____.

A. concentration

B. change

C. amusements

D. stories

3. According to the passage, what is the main cause of the great gap between readers and poetry?

A. Students are becoming less interested in poetry.

B. Students are poorly educated in high school.

C. TV and the Internet are more attractive than poetry.

D. Poems have become difficult to understand.

4. In the last paragraph, the writer question _____.

A. the difficulty in studying poems

B. the way poems are taught in school

C. students' wrong ideas about poetry

D. the techniques used in writing poem

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