问题 读图填空题

下图是碳循环的示意图,图中“→”表示碳的流动方向,请结合示意图回答相关问题:

(1)写出图中具有捕食关系的食物链__________(用字母和箭头表示)。图中食物链上相邻物种之间存在着,相邻物种的某些个体行为给对方提供了大量的有用信息,这说明信息传递在生态系统中的作用是_____________。

(2)低碳减排,人人有关。,请从能量流动和碳循环的角度谈谈该理念的合理性:__________、_________。写出你为低碳减排而改变的一条生活方式:_________。

(3)低碳减排要求调整现有的产业结构。某地建立了:是以太阳能为动力,以沼气为纽带,将日光温室、沼气池、蔬菜种植和温室养猪相结合的一种新的农业生产模式。沼气池中的产甲烷杆菌在生态系统中属于_________(成分)。该生态系统符合低碳减排的理由:______________。

答案

(1)B→C→D     调节生物的种间关系,维持生态系统的稳定

(2)从能量流动的角度看,可减少能量流动中的损失,节约粮食     从碳循环的角度看,可减少牲畜呼吸作用产生的温室气体     驾驶机动车改为骑自行车(答案合理即可)

(3)分解者     充分利用了太阳能和沼气能,节约了能源和减少了化肥的使用,从而减轻温室气体的排放

阅读理解

“I’m seventy years old,” says the gray-haired lady proudly to the entertainer at her Community Club dinner.

“Did you hear that, everyone?” says the entertainer. “This lovely lady is just seventy years young! And she doesn’t look a day over fifty.” He has been careful not to use the word “old”. In a society where youth is so admired, old age is often seen as something sad, something to fight against. Americans prefer not to say “old” people. They use the expression “senior citizens”. They do not talk about “old people’s” homes, but “retirement” homes.

In fact, the entertainer is not so wrong. Seventy is not very old these days. People in the US are living longer and longer. In1980, 12 percent of Americans were over sixty-five years old. By 2030, 21 percent will be over sixty-five. One reason for this is that families are getting smaller. The average couple now has only 1.8 children. At the same time, improved medical care means that people are living longer.

This change in the age of Americans is going to have serious results. For one thing, medical costs are rising. The government is unable to pay the elderly people’s medical bills that have gone up very much. Some old people have to leave hospital “sicker and quicker” than they should, before they are really better.

More fortunate senior citizens, though, who still have good health, want new laws to be passed to allow them to stay at work. In the past, the retirement age was sixty-five, but that is changing now. Older people are stronger and more energetic than ever before. Many of them refuse to stop working just because they have reached a certain age.

There is a change, too, in the way in which elderly people see themselves. Many are no longer happy to accept the gray hair, bald heads, and boring clothes of their own parents. They like to wear younger-looking clothes and bright makeup(化妆品).American women spend millions of dollars a year on operations to lift their faces and make those ugly wrinkles disappear. Men are prepared to spend even more on operations to plant new hair on their bald spots. It’s worth any money to look younger.

60. In America people try to avoid using the word “old” because    ____.

A. the old age is seen as something that isn’t admired

B. it is now believed to bring bad luck to elderly people

C. the standard of getting old has changed  

D. the change in the age has caused a healthy problem

61. According to the passage, which of the following does NOT describe the American society correctly?

A. People live longer because of improved medical care.

B. The government finds it difficult to afford the medical bills of the elderly.

C. People use polite expressions when talking about old age.

D. The old patients’ time in hospital is strictly limited.

62. Which of the following is not the result of the changing in the age of Americans?

A. Medical costs are rising.          

B. The family becomes smaller.

C. The retirement age needs changing. 

D. Elderly people spend a lot on keeping young.

63. This passage is most probably taken from        .

A. a travel booklet     B. a magazine   

C. an advertisement     D. a medical report 

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