TF听力真题XYS_CH_003_L3

听力音频：

托福听力真题CH系列 003套

 

– Listening Passage 6

第1题

what is the main purpose of the lecture?

A To introduce a theory about why marine animals form symbiotic relationships

B To discuss the application of categories of symbiosis to marine animals

C To question research done on the relationship between sea butterflies and amphipods

D To explain how the categories of symbiosis were developed by researchers

 

 

第2题

Why are seals and dolphins mentioned in the lecture?

 

A To give an example of animals that are disadvantaged by parasitic relationship

B To give an example of a symbiotic relationship where both organisms benefit

C To point out that all symbiotic relationships have advantages and disadvantages

D To compare the categories of commensalism and mutualism

 

 

第3题

According to the professor, what is one factor that makes categorizing symbiotic relationships difficult?

 

A New types of symbiotic relationships are always being discovered.

B It is not always clear what an animal gains or loses from a symbiotic relationship.

C The nature of the symbiotic relationship may change over time.

D Many symbiotic relationships are only temporary.

 

 

第4题

What point does the professor make about sea butterflies that are captured by amphipod

 

A They are often eaten by the amphipods.

B They are eventually released by the amphipods

C They are used as a lure by the amphipods to attract prey.

D They benefit from their relationship with the amphipods. .

 

 

第5题

Why did researchers conclude after their experiment involving predatory fish?

A The predators of amphipods learn to interpret the amphipod and sea butterfly as one larger animal.

B The primary predator of amphipods does not have good eyesight.

C Amphipods and sea butterflies share, many of the same chemical compounds.

D The amphipods are protected from predators by chemicals In the sea butterfly.

 

 

第6题

Listen again to part of the lecture. Then answer the question.

Why does the professor say this:

A To acknowledge that she does not fully understand the relationship between the two organisms

B To ask students to explain what the disadvantages are for each organism

C To encourage the students to propose potential advantages of the relationship

D To indicate that the student overstated the disadvantage to the sea butterfly

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