Conversation one
1.Why does the student speak with the professor?
A.To get a letter of recommendation to study in a school of music
B.To get information about musical activities on campus
C.To discuss giving piano lessons to other students
D.To discuss the requirements for enrollment in a jazz class
2.Why did the student decide to study at the university rather than specialize in music at a conrvatory?
A.She thought a university education would be better for her career.
B.She thought the university would be more likely to admit her.
C.She is more interested in science than in music.
镇定的近义词和反义词D.She is better at analyzing music than playing it.
3.How does the student know the professor?
A.He is her piano teacher.
B.He is the director of a band she recently joined.
C.She is taking one of his cours.
D.She has a part-time job in the music department.
4.What point does the professor make about the student Web page that he recommends?
A.It is updated daily.
B.It features performances by well-known musicians.值周生
C.It will help the student with a paper she is writing.
D.It provides information on local musical groups.晕车后怎么办
5.What can be inferred about the student when she says this:
A.She is eager to hear the professor’s band perform.
B.She is imagining herlf as a member of the band.
C.She is unsure if she would like to play in such a band.
D.She does not find the information helpful.
Lecture one
1.What is the main purpo of the lecture?
A.To explain methods astronomers u to classify stars
B.To explain the formation of molecular clouds in the univer
C.To discuss how some stellar embryos fail to become stars
D.To discuss similarities between brown dwarfs and planets
2.According to the professor, why is the study of brown dwarfs particularly challenging?
A.They cannot be detected directly.
B.They combine characteristics of very distinct celestial objects.
C.They appear in colors ranging from brown to red.
D.They are always near very bright stars.
3.Why does the professor discuss how stars originate?
A.To explain how brown dwarfs begin to form
B.电脑护眼To suggest that brown dwarfs do not originate in molecular clouds
C.To explain why brown dwarfs emit light for billions of years
D.价值创造To show that stellar embryos cau turbulence within molecular clouds
4. According to the ejection theory, why do some stellar embryos stop growing before they become stars?
A.The motion of dust and gas inhibits their growth.
B.The cores in which they form are not den enough.
C.They start forming in the area of a molecular cloud with the least amount of material.
D.They are moved by gravitational forces to area outside cores.
5.Why does the professor mention that newborn stars are surrounded by disks of dust and gas?
A.To describe a method for testing two theories about brown dwarfs
B.To clarify how brown dwarfs are drawn into star systems
C.To emphasize that brown dwarfs move at low velocities
D.To introduce planet formation as the topic of the next lecture
6.What is the professor’s attitude toward the two theories?
A.植物怎样过冬He is convinced that neither of them can explain why brown dwarfs have stellar disks.
B.He hopes both theories will be confirmed by computer simulations.
C.He thinks evidence supports the turbulence theory even if he cannot rule out the ejection theory.
D.He finds the ejection theory more attractive than the turbulence theory.
Lecture two
1.What does the professor mainly discuss?
A.The effects of agriculture on early human societies
B.The benefits of domesticating wheat plants
C.Evidence about the earliest domestication of plants
D.Archaeological evidence about where wild wheat was first cultivated
2.Why does the professor describe some characteristics of wild wheat plants?
A.To show one reason why humans began to domesticate plants
B.To illustrate how ancient people made flour
C.梦见楼塌了To explain why the spikelets of wild wheat do not fall off the stalk
D.To show that wild plants are less nutritious than domesticated plants
3.Why does the professor mention a computer model that was bad on cultivation experiments?
A.To show the advantages of computer simulations for answering complex problems
B.To show the difficulties of determining the age of spikelets found at archaeological sites
C.To explain how the cultivation of crops can result in genetic changes设计工作
D.To explain the claim that the domestication of crops was a short process
