新視野二版視聽說課件

1、 Stem cell researchstem sell n.干細胞 kidney n. 腎maintenance n. 維護，保養(yǎng) (the repairs, painting etc. that are necessary to keep something in good condition) e.g. The window had been replaced last week during routine maintenance.jawbone n. 頜骨，腭骨 e.g. The doctor found that his lower jawbone was broken in tw

2、o places.(To be continued)rejection n. 排斥反應 (the failure of someones body to accept a new organ) e.g. The doctor warned that dangers of rejection cannot be erfere with 妨礙，阻止 (prevent something from succeeding or from happening in the way that was planned) e.g. Aspirin interferes with the

3、bodys ability to form blood clots.manipulate v. 操縱 (control or influence) e.g. She was unable, for once, to control and manipulate events.(Continued)1. Q: What is the passage mainly about? B) Benefits from stem cell research.2. Q: Who is against stem cell research? A) The Republican Party.3. Q: What

4、 is special about a stem cell? A) It can e another type of cell.4. Q: When can a stem cell e another cell type? A) When it divides.5. Q: Why do some people oppose stem cell research? D) They dont want to interfere with nature.Questions and keyThe improvement of rice breeder n. 育種者；培育者 (someone who b

5、reeds animals or plants, especially as their job) e.g. Her father was a well-known racehorse breeder.genome n. 基因組 (the complete set of genes in a living thing) e.g. Scientists have succeeded in mapping the human genome.strain n. 品種 (a particular type of animal, insect or plant) e.g. Every year new

6、strains of influenza develop.pest n. 害蟲 (an insect or small animal that damages plants or supplies of food) e.g. Each year ten percent of the crop is lost to pests.barley n. 大麥 e.g. Barley and oats are cereals.KeyScientists now know a lot more about the grain that people have eaten for 10,000 years.

7、 (S1)_ teams around the world have completed a map of the (S2)_ of rice. The findings appeared last week in the (S3)_ Nature.The aim is to speed up the improvement of rice. The scientists (S4)_ that the kinds of rice plants used now have reached the limit of their (S5)_. Yet world rice production mu

8、st (S6)_ by an estimated 30 percent in the next 20 years to meet demand. By 2025, as many as 4.6 billion people will depend on rice for (S7)_. There is a lot of pressure on breeders to improve the crop, and the rice genome is a valuable tool to do that. (S8)_ _.(To be continued)Research genes journa

9、l warn productivity grow survivalPlant breeders have already used preliminary information from the rice genome to create experimental strains of rice that better resist cold and pestsThe researchers also say rice is an excellent choice for genetic mapping and engineering. Rice genes have only about

10、390 million chemical bases. That might sound like a lot. But other major food grains have thousands of millions. (S9)_ _. Because rice is the first cereal crop to be fully analyzed, researchers expect that sufficient knowledge of its genetic information will reveal the heredity of more complex grain

11、s, including corn, wheat and barley.(S10)_ _. When scientists can identify and manipulate genes that cause certain diseases, mankind will cure them easily. The human genetic map may help us control a persons height, weight, appearance and even length of life.(Continued)The new map could better expla

12、in more than just rice. Rice shares a common ancestor with other cereal cropsWhile significant progress has been made in the analysis of the rice genome, the mapping of the human genes is also making headwayNature Nature is the international weekly journal of science: a magazine style journal that p

13、ublishes full-length research papers in all disciplines of science.therapeutic adj. 治療的 (curing) e.g. The treatment has little therapeutic value.entail v. 使必需 (make necessary) e.g. The surgery entailed placing a screw into a bone in her wrist.controversial adj. 有爭議的 (causing a lot of disagreement) e

14、.g. The changes are bound to be controversial.halt v. 停止 (stop) e.g. They halted at a short distance from the house.Human cloning (To be continued)harvest v. 收采（人的器官，細胞等）(take organs, cells etc. from a persons body) e.g. To harvest organs from human body involves moral problems.(Continued)Questions and key1. Q: What is the passage mainly about? C) Types and problems of human cloning.2. Q: How many types of human cloning are introduced in the passage? B) Three.3. Q: Who is against reproductive cloning? D) All of the above.4. Q: What are the moral con