31. (A) Two different types of bones in the human body.
(B) How bones help the body move.
(C) How bones continuously repair themselves.
(D) The chemical composition of human bones.
32. (A) They defend the bone against viruses.
(B) They prevent oxygen from entering the bone.
(C) They break down bone tissue.
(D) They connect the bone to muscle tissue.
33. (A) They have difficulty identifying these cells.
(B) They aren't sure how these cells work.
(C) They've learned how to reproduce these cells.
(D) They've found similar cells in other species.
34. (A) To learn how to prevent a bone disease.
(B) To understand differences between bone tissue and other tissue.
(C) To find out how specialized bone cells have evolved.
(D) To create artificial bone tissue.
35. (A) A new fuel for buses.
(B) The causes of air pollution.
(C) A way to improve fuel efficiency in buses.
(D) Careers in environmental engineering.
36. (A) Her car is being repaired.
(B) She wants to help reduce pollution.
(C) Parking is difficult in the city.
(D) The cost of fuel has increased.
37. (A) A fuel that bums cleanly.
(B) An oil additive that helps cool engines.
(C) A material from which filters are made.
(D) An insulating material sprayed on engine parts.
38. (A) The high temperatures required for its use.
(B) The high cost of materials used in its production.
(C) The lack of trained environmental engineers.
(D) The opposition of automobile manufacturers.
39. (A) To present an award to a musician.
(B) To thank the organizers of "Time Out for the Arts."
(C) To invite musicians to join the concert tour.
(D) To introduce the guest speaker for the evening.
40. (A) The pianist is an old friend of hers.
(B) Many people have come to the presentation.
(C) The auditorium has an excellent sound system.
(D) She enjoys going to concerts.
41. (A) When he was a child.
(B) When he finished his studies.
(C) When he began his concert touring.
(D) When he was invited to a musical competition.
42. (A) Discuss his experiences on the concert tour.
(B) Explain why he agreed to give the lecture.
(C) Comment on his musical training at the Juilliard School.
(D) Talk about how he learned to compose music.
43. (A) The effect of advertising on world markets.
(B) Modem advertising techniques.
(C) Forms of communication in the American colonies.
(D) The early history of advertising.
44. (A) An educated population.
(B) A large supply of goods and services.
(C) A large number of publications.
(D) An industrialized society.
45. (A) Samples of products.
(B) Signs on shops.
(C) Pictures of products painted on walls.
(D) Free paper pamphlets. 共10页: 上一页 [1] [2] 3 [4] [5] [6] [7] [8] [9] [10] 下一页