According to a theory the professor mentions, why do dolphins travel side by side?. Listen again to part of the lecture by playing Track 47.. The differences between land and marine ma
Trang 1Listen to Audio Track 46.
Questions
12 What is the lecture mainly about?
How dolphins produce the sounds they make
How dolphins teach their young to identify signature whistles
The professor’s experience with dolphins on a research boat
Various ways dolphins communicate with one another
13 According to a theory the professor mentions, why do dolphins travel side by side?
To view each other’s bubble streams
To hear each other’s signature whistles
To avoid interfering with other dolphins’ sonar clicks
To keep mothers close to their young
14 What does the professor imply about bubble streams?
They help protect dolphins from predators
Their function is similar to that of signature whistles
They do not appear to serve a communicative function
Dolphins use them to sense the movement of the water
376
Trang 215 Why does the professor mention the time she spent on a boat doing
research?
To encourage students to do field work
To inform students about a paper she wrote
To show how scientists collect data on marine life
To illustrate that dolphins are difficult to locate
16 Listen again to part of the lecture by playing Track 47
Then answer the question
What does this example illustrate?
The differences between land and marine mammals
The importance of burst pulses as a way dolphins communicate
One reason dolphins travel in large groups
One way dolphins use signature whistles
Listening
Trang 3Listen to Audio Track 48
Questions
17 Why does the student go to Professor Kirk’s office?
To find out if he needs to take a certain class to graduate
To respond to Professor Kirk’s invitation
To ask Professor Kirk to be his advisor
To ask Professor Kirk to sign a form
18 Why is the woman surprised at the man’s request?
He has not tried to sign up for Introduction to Biology at the registrar’s office
He has waited until his senior year to take Introduction to Biology
A journalism student should not need a biology class
Professor Kirk no longer teaches Introduction to Biology
19 What does the man say about his advisor?
She encouraged the man to take a science class
She encouraged the man to major in journalism
She is not aware of the man’s problem
She thinks very highly of Professor Kirk
378
Trang 420 How will the man probably try to communicate his problem to
Professor Kirk?
By calling her
By sending an e-mail to her
By leaving her a note
By visiting her during office hours
21 Listen again to part of the conversation by playing Track 49
Why does the man say this to the woman?
To thank the woman for solving his problem
To politely refuse the woman’s suggestion
To explain why he needs the woman’s help
To show that he understands that the woman is busy
Listening
Trang 5Listen to Audio Track 50
Questions
22 What is the lecture mainly about?
Various theories explaining why Mars cannot sustain life
Various causes of geological changes on Mars
The development of views about the nature of Mars
Why it has been difficult to obtain information about Mars
23 According to the professor, what was concluded about Mars after the first spacecraft flew by it in 1965?
It had few geological features of interest
It was similar to Earth but colder
It had at one time supported life
It had water under its surface
24 What does the professor imply about conditions on Mars billions of years ago?
Choose 2 answers
Mars was probably even drier than it is today
The atmospheric pressure and the temperature may have been higher than they are today
Mars was inhabited by organisms that have since become fossilized
Large floods were shaping the planet’s surface
Trang 625 What is the possible significance of the gullies found on Mars in recent years?
They may indicate current volcanic activity on Mars
They may indicate that the surface of Mars is becoming increasingly drier
They may indicate the current existence of water on Mars
They may hold fossils of organisms that once existed on Mars
26 Listen again to part of the lecture by playing Track 51
Why does the professor say this?
To stress that Mars is no longer interesting to explore
To describe items that the spacecraft brought back from Mars
To share his interest in the study of fossils
To show how much the view of Mars changed based on new evidence
27 Listen again to part of the lecture by playing Track 52
Why does the student say this: “What were they thinking?”
To ask for clarification of a previous statement
To convey his opinion
To rephrase an earlier question
To express his approval
Trang 7Listen to Audio Track 53
Questions
28 What does the professor mainly discuss?
The design and creation of the Statue of Liberty
The creators of two colossal statues in the United States
The purpose and symbolism of colossal statues
The cost of colossal statues in ancient versus modern times
29 What evidence does the professor give that supports the idea that modern-day colossal statues are valued social and political symbols?
They are very costly to build
They are studied in classrooms around the world
They are designed to last for thousands of years
They are inspired by great poetry
30 According to the professor, what was one result of the Great Depression
of the 1930’s?
International alliances eroded
Immigration to the United States increased
The public experienced a loss of confidence
The government could no longer provide funds for the arts