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托福TPO66听力原文+题目

1. What is the main purpose of the lecture?

A. To highlight the dangers fish encounter

B. To compare the movement of fish and humans

C. To discuss the function of certain fish fins

D. To show the way in which fish fins have evolved

2. According to the professor, what problem do requiem sharks have when swimming?

A. Their large fins cause decreased buoyancy.

B. Their fins do not function well as brakes.

C. They cannot make sharp turns.

D. They are unable to accelerate rapidly.

3. How does the professor illustrate the meaning of the term “drag”?

A. By describing the movement of arms and legs

B. By mentioning the case of the propeller

C. By explaining how fish escape from predators

D. By comparing it to the force of air on an airplane

4. Why does the professor mention sea horse and eels?

A. To illustrate that not all fish have a caudal fin

B. To give an example of buoyancy

C. To discuss long-distance swimmers

D. To show how long, narrow tail fins function

5. According to the professor, what do rounded caudal fins allow the fish to do?

A. To brake more effectively

B. To keep their balance

C. To gain speed rapidly

D. To change direction

6. Why does the professor say this

A. She wants the students to make predictions on the speed of fish

B. She wants to show how fish communicate with one another.

C. She thinks the students have not read the textbook thoroughly

D. She wants to convey the extraordinary power of some fins.