发布时间 : 星期六 文章新视野大学英语视听说教程第二版4Unit8答案更新完毕开始阅读7db39791b8f67c1cfad6b8d7
Unit 8 Is biotechnology our friend or enemy?
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Directions: Click on the speaker to the left to start playing the audio recordings Parts I, II and III. They will be played continuously. Once the recording starts playiplease do NOT click on either the speaker icon or the 'Unit Quiz' link in the menu above. Otherwise, you may lose the chance of hearing the complete recording.
Part I Script
Directions: Listen to the short dialogs, and then choose the correct answers to the questions. You will hear the recording twice. After the first playing, there will be time for you to choose the correct answers. Use the second playing to check your answers.
1. (Listen to the audio recording for the question.)
A. He does not want to eat GM food.
B. He wants GM food labeled.
C. He does not care if GM food is labeled.
D. He agrees with the woman.
2. (Listen to the audio recording for the question.)
A. The man is against organ cloning.
B. The woman is against organ cloning.
C. The man is a scientist devoted to organ cloning.
D. The woman will let her organ clones once it fails.
3. (Listen to the audio recording for the question.)
A. She wants the man to go to the meeting.
B. She wants the man to pick up the children.
C. She wants to clone the man.
D. She does not want a clone of the man.
4. (Listen to the audio recording for the question.)
A. The two speakers have a lot of common interests.
B. The two speakers have both chosen Mr. Green's elective course. C. The woman has a lot of knowledge on genetics.
D. The man is beginning to like genetics.
5. (Listen to the audio recording for the question.)
A. Both the man and the woman are against GM food.
B. Both the man and the woman are for the GM food.
C. The woman is probably a consumer of GM foods.
D. The man is probably a consumer of GM foods.
Part II Script
Directions: Listen to the passage three times. When the passage is read for the first time, listen for the general idea. When the passage is read the second time, fill in the blanks numbered from (1) to (7) with the exact words you hear. For blanks numbered from (8) to (10), write down either the exact words you hear or the main points in your own words. When the passage is read the third time, check your answers.
There are many ways in which human stem cells can be used in basic research and in clinical research. Studies of human stem cells may (1)identifyyield information about the complex events that occur during human development. A primary goal of this work is to (2) how stem cells become divided or differentiated (分化).
centralScientists know that turning genes on and off is (3)abnormal to this process.
Some of the most serious medical conditions, such as cancer and birth defects, are due to (4) cell division and differentiation. A better howunderstanding of the genetic and molecular controls of these processes may yield information about (5) such diseases arise and suggest new tostrategies for therapy. A significant barrier (6) this use and most uses
signalsof stem cells is that scientists do not yet fully understand the (7) that turn specific genes on and off to influence the differentiation of the stem cell. (8)
that could be used for cell-based therapies. Today, donated organs and tissues are often used to replace ailing or destroyed tissue, but the need for transplantable tissues and organs far outweighs the available supply. (9)
to treat diseases including Parkinson's and Alzheimer's diseases, spinal cord injury, stroke, burns, heart disease and diabetes. For example, (10)
. (1) (2) (3) (4) Your answer yield identify central abnormal Correct answer yield identify central abnormal (5) (6) (7) (8) how to signals how to signals The most important potential application of human stem cells is perhaps the generation of cells and tissues Stem cells, directed to differentiate into specific cell types, will offer a source of replacement cells and tissues it may become possible to generate healthy heart muscle cells in the laboratory and then transplant those cells into patients with chronic heart disease (9) (10)
Part III Script
Directions: Listen to the following recording, and then choose the correct answers to the questions. You will hear the recording twice. After the first playing, there will be time for you to choose the correct answers. Use the second playing to check your answers. 1. What is the Iceland company doing?
A. Creating a detailed map of the genes of the Icelandic people. B. Creating a detailed map of all human genes.
C. Creating a map as detailed as those by some other projects. D. Creating a map less detailed than that by the American company.
2. Why do the people of Iceland present a special opportunity to study the human
genome?
A. Iceland has a small population.
B. Most of the Icelanders have a small group of ancestors. C. Plenty of records of their ancestors are available.