Tham khảo tài liệu 'the complete guide to the toefl test part 73', ngoại ngữ, toefl - ielts - toeic phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Lesson 18 General Specific Task 479 11. What is the topic of the reading __ 12. Why are dolls a good way to learn about a society 13. Some dolls are used to amuse children but 14. The two types of educational dolls are and 15. What is the discussion about 16. The kachina dolls are an example of because they teach Hopi children and 17. Why do Hopi children need dolls to learn about spirits Task C Read the following passage. 45 seconds The process of oxidation occurs when metals are exposed to air in the presence of a liquid. Oxygen molecules combine with the molecules of the metal and form an oxide layer on the surface of the metal. The process requires a liquid called an electrolyte that helps electrons move. Oxidation may simply be a cosmetic problem a discoloration on the surface of otherwise shiny metal. In other cases the process of oxidation may cause structural weakness in the metal a process called corrosion. Speaking Notes on the reading Now start the Audio Program. Listen to a lecture in a chemistry class. Q 480 Section 3 Guide to Speaking Notes on the lecture 18. What is the main point of the reading 19. How does the formation of rust occur 20. According to the reading oxidation may be or it may 21. The professor says that rust is 22. What three things are needed to get rust 23. According to the reading the liquid that causes rust is called an---- 24. Rust is an example of because it damages metal. 25. What are some examples of things that are affected by rust ----------- 26. Rust costs a lot of money. People spend money on and TaskD Read the following passage. 45 seconds Ever since the late nineteenth century scientists have used identical twins in studies and experiments. Twins are particularly interesting to scientists who are investigating the concept of nature versus nurture in other words scientists who want to know if people .
