第六期精听营第三次课

1、杰哥第六期精听营,Harder Than Harder Better Than Better,13. What does the professor imply about the best modern violin makers? A. They are unable to recreate the high quality varnish used by Cremonese violins makers. B. Their craftsmanship is comparable to that of the Cremonese violins makers. C. They use wo

2、od from the same trees that were used to make the Cremonese violins. D. Many of them also compose music for the violin.,15. What factor accounts for the particular density differential of the wood used in the Cremonese violins? A. The trees that produced the wood were harvested in the spring. B. The

3、 trees that produced the wood grew in an unusually cool climate. C. The wood was allowed to partially decay before being made into violins. D. The wood was coated with a local varnish before it was crafted into violins.,16. The professor describes an experiment in which wood was exposed to a fungus

4、before being made into a violin. What point does the professor make about the fungus? A. It decomposes only certain parts of the wood. B. It was found only in the forests of northern Italy. C. It was recently discovered in a vintage Cremonese violin. D. It decomposes only certain species of trees.,1

5、7. Why does the professor say this: A. To find out how much exposure students have had to live classical music. B. To use student experiences to support his point about audience members. C. To indicate that instruments are harder to master than audience members realize. D. To make a point about the

6、beauty of violin music.,12. What is the lecture mainly about? A. The discovery of a previously unknown trace metal B. The role trace metals play in carbon cycling C. Ways that living organisms rid themselves of trace metals D. Ways that zinc interacts with carbon dioxide,13. What does the professor

7、imply about the conversion of carbon dioxide molecules in plants? It is an unusually complex chemical process. It only takes place in full sunlight. It proceeds slowly when cadmium is present. It is regulated by an enzyme that may contain zinc.,14. According to the professor, why is it surprising th

8、at many marine plants are able to survive near the surface of oceans? A. Weather conditions near the surface disrupt certain life processes. B. The salt content of surface waters is constantly changing. C. Surface waters contain low quantities of zinc. D. Surface waters absorb large amounts of carbo

9、n dioxide.,15. According to the professor, what important function do diatoms serve? A. They alter cadmium so it is less toxic to humans. B. They help cycle zinc in places where it is scarce. C. They distribute carbon throughout the ocean. D. They remove cadmium from the ocean floor.,16. What point

10、does the professor make when she talks about cadmium being poisonous to humans? A. That cadmium and zinc can serve a similar function in plant enzymes B. That both cadmium and zinc are rare in plant enzymes C. That most trace metals are poisonous to humans D. That cadmium does not serve any biologic

11、al purpose,17.The professor states that the discovery of an enzyme containing cadmium is important. What are two reasons that this discovery is important? Click on 2 answers. A. It may lead to the discovery of new enzymes that use other trace metals. B. It may explain the oceans increased level of c

12、arbon dioxide. C. It may explain the scarcity of some elements in the ocean. D. It may help scientist better understand global warming.,6. What is the main purpose of the lecture? A. To explain the governments role in the regulating assisted migration B. To discuss ways in which plants and animals a

13、dapt to climate change C. To discuss a controversial approach to conserving plant and animal species D. To describe a recently discovered consequence of global warming,7. According to the professor, what problem is assisted migration intended to overcome? A. To diminishing amount of undeveloped land

14、 that species can migrate through B. The relative lack of nutrients available in cooler latitudes and higher elevations C. The increase in alternations between cool and warm periods D. Competition from other species in certain native habitats,8. What point does the professor make when she discusses

15、the cane toad? A. Translocated species sometimes die out from lack of food. B. Translocated species may spread too quickly in their new environment. C. Several techniques are available to achieve assisted migration. D. Animal species are often easier to translocate than plant species are.,9. What do

16、es the professor imply when she mentions translocating networking of species? A. There are aspects of interdependency that are unknown. B. Some species evolve in ways that help them survive in new habitats. C. It is difficult to know how far to move a network of species from its native habitat. D. M

17、any assisted-migration plans should involve the translocation of just one species.,10. What does the professor imply about the governments role in regulating assisted migration in the United States? A. The government should continue to encourage assisted migration. B. The government has created poli

18、cies that have proved unhelpful. C. The government should follow the example set by other countries. D. The government needs to increase its involvement in the issue.,11. What is the professors attitude toward the effort to save the Florida torreya? A. She is glad that some conservationists are will

19、ing to take a chance on assisted migration. B. She is concerned because it may have unintended consequences. C. She is surprised because other species are more endangered than Florida torreya is. D. She expects the effort will have to be repeated several times before it succeeds.,背景,Mass extinction,

20、主题,Assisted migration,解释,为何assist,问题,Die out Invasive Interd Work?,总结,政府作用,1. Why does the man go to see the professor? A. To ask for help in choosing a topic for his term paper B. To ask the professor to explain how to complete an assignment C. To ask about a point raised in a recent lecture D. To

21、offer to help the professor with her research project,2. Why does the professor mention male frogs that lower their voices? A. To give an example of a behavior that can be predicted using game theory B. To reinforce the definition of selective adaptation C. To give an example of deceptive behavior i

22、n animals D. To compare the behavior of butterflies and frogs,3. Why does the professor talk about computers? A. To help the man understand game theory B. To describe how biologists analyze data about adaptation C. To suggest a way for the man to find information about game theory D. To explain the format required for the mans term paper,4. What does the man need to do for his term paper? A. Interpret the statistical data in a journal article B. Summarize t