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精英家教網 > 高中地理 > 題目詳情

【題目】閱讀理解。

閱讀下列短文,從每題所給的四個選項 (A 、B 、C D )中,選出最佳選項。

Scientists at Harvard University have recycled a kidney(腎)-in a rat. The researchers removed a kidney from a dead rat. Later, the renewed kidney was put into a living rat. It wasn't perfect. It did, however, show signs of working like a kidney should.

"It's really beautiful work," Edward Ross, a kidney researcher at the University of Florida in Gainesville, told Science News. He didn't work on the new study.

Kidneys are bean-shaped and act like guards in the body. They clean the blood by removing waste and extra water. Every day, an adult's kidneys filter (過濾) enough blood to fill a bathtub half full. Along the way, they produce eight cups of urine (尿) from that waste and water. When a person's kidneys fail, all of that waste stays in the body. Such patients can quickly become very sick and die, unless they are regularly connected to a machine that filters their blood.

At any given time, about 100,000 people in the United States are waiting for a replacement kidney. But healthy donated kidneys are difficult to get. Either a living person must donate one, or a kidney must be removed from someone who just died and earlier had agreed to the donation. In either case, people receiving new kidneys face the r isk that their bodies will reject the donated ones.

But there may be another option. Researchers use knowledge of living things to grow or improve tissue that can aid human health. Harald Ott's team at Harvard started with a "used" kidney.

Scientists added kidney cells from rats and blood vessel cells from people to the matrix(母體). These cells attached themselves and began to multiply. Before long, they formed new kidney tissue.

The scientists placed this renewed kidney into another rat. There it produced a small amount of urine. This experiment shows that the lab-grown kidney can do at least some of the work performed by a healthy kidney.

The results are a promising first step toward helping people with serious kidney problems. "This is still very early, but they've come a long way," Ross said.

【1】What can we infer from Paragraph l?

A. Biology is a new and helpful science.

B. It's hard to put the rebuilt kidney into the rat.

C. Kidneys are very important to our life.

D. A used kidney may be recycled for new life.

【2】What does Paragraph 3 mainly talk about?

A. The relationship between kidneys and health.

B. The difficulty of curing serious kidney diseases.

C. The function and importance of kidneys.

D. The methods of curing kidneys diseases.

【3】 For what purpose does the author use the figure 100,000 in Paragraph 4?

A. To stress used kidneys are hard to get.

B. To show the great need for healthy kidneys.

C. To explain many American people get kidney diseases.

D. To call on people to donate kidneys.

【4】Which of the following is true according to the text?

A. The scientists are satisfied with the result of te experiment.

B. Ross is a kidney expert who is involved in the experiment.

C. The function of the renewed kidney is the same as a healthy kidney.

D. The renewed kidney produced a great deal of urine.

【答案】

【1】D

【2】C

【3】B

【4】A

【解析】

本文屬于說明文閱讀,介紹了一個研究腎臟的實驗結果,在文章中提及了腎臟的功能和重要性。

【1】D推理判斷題。根據文章第一段第二句The researchers removed a kidney from a dead rat. Later, the renewed kidney was put into a living rat.可知一個腎可以回收用于新的生命。故選D。

【2】C 主旨大意題。根據文章第三段前兩句Kidneys are bean-shaped and act like guards in the body. They clean the blood by removing waste and extra water.可知這段主要介紹腎臟的功能和重要性。故選C。

【3】B 細節(jié)理解題。根據文章第四段的句子At any given time, about 100,000 people in the United States are waiting for a replacement kidney.可知在第四段作者用了100,000這個數字表明對健康的腎臟需求量很大。故選B。

【4】A 細節(jié)理解題。根據文章最后一段的句子The results are a promising first step toward helping people with serious kidney problems.可知科學家認為這次研究是很有前途的第一步,說明科學家們對于本次研究結果很滿意。故選A。

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