问答题
Directions
: You will now listen to part of a lecture. You will then be asked a question about it. After you hear the question, give yourself 20 seconds to prepare your response. Then record yourself speaking for 60 seconds.
Using the points and examples from the talk, explain how substitute goods and complement goods influence demand for a particular product.
Using the points and examples from the talk, explain how substitute goods and complement goods influence demand for a particular product.
【正确答案】
【答案解析】Prompt
Using the points and examples from the talk, explain how substitute goods and complement goods influence demand for a particular product.
Important Points
In this item, you need to explain the ways the two kinds of goods—substitute goods and complement goods—have an effect on the demand for particular products. You should use the examples of butter and margarine and of CDs and CD players to help explain the effect. Substitute goods are products that are similar enough to be interchangeable, so the price of one will influence the demand for the other. For example, margarine and butter are substitute goods, so if the price goes up for butter, then the demand goes up for margarine, which can be used as a butter substitute. Complement goods are those in which two products can"t be used without the other, so the price of one will influence the demand for both in the same way. For instance, compact discs (CDs) and CD players are complement goods. If the price of CDs goes up, the demand will go down not only for CDs, but also for CD players.
High-level Response: Listen to
Rater Comments
The speaker does a good job of explaining the two kinds of goods and of using the examples to explain how they each affect the demand. It is easy to follow the organization of her ideas and her pronunciation is mostly quite clear. She mispronounces the words " butter " and " margarine ," but it is still possible to understand her response. While her grammar contains some minor errors, in other areas she is able to use fairly difficult grammatical constructions easily, such as " she stated an example...saying that if the price of the CD goes up, then the demands for both the CD and the CD players will go down. " There are a few hesitations during her response as she pauses to consider what to say, but they do not interfere greatly with the flow of her response.
Mid-level Response: Listen to
Rater Comments
The speaker does a fairly good job of explaining substitute goods and their effect on demand, but she runs out of time before she can finish talking about complement goods. She also never mentions the examples the professor gave. If she had not included an unnecessary introduction at the beginning—explaining that the professor is talking about economic theory in an economics class—she would have had a bit more time to finish discussing what the prompt required. Her speech also contains many hesitations, so listeners have to make an effort to follow her ideas. In addition, her response contains numerous minor grammatical errors, such as " one goods," "substitute of another ," and " the two good ." [听力原文]
Using the points and examples from the talk, explain how substitute goods and complement goods influence demand for a particular product.
Important Points
In this item, you need to explain the ways the two kinds of goods—substitute goods and complement goods—have an effect on the demand for particular products. You should use the examples of butter and margarine and of CDs and CD players to help explain the effect. Substitute goods are products that are similar enough to be interchangeable, so the price of one will influence the demand for the other. For example, margarine and butter are substitute goods, so if the price goes up for butter, then the demand goes up for margarine, which can be used as a butter substitute. Complement goods are those in which two products can"t be used without the other, so the price of one will influence the demand for both in the same way. For instance, compact discs (CDs) and CD players are complement goods. If the price of CDs goes up, the demand will go down not only for CDs, but also for CD players.
High-level Response: Listen to
Rater Comments
The speaker does a good job of explaining the two kinds of goods and of using the examples to explain how they each affect the demand. It is easy to follow the organization of her ideas and her pronunciation is mostly quite clear. She mispronounces the words " butter " and " margarine ," but it is still possible to understand her response. While her grammar contains some minor errors, in other areas she is able to use fairly difficult grammatical constructions easily, such as " she stated an example...saying that if the price of the CD goes up, then the demands for both the CD and the CD players will go down. " There are a few hesitations during her response as she pauses to consider what to say, but they do not interfere greatly with the flow of her response.
Mid-level Response: Listen to
Rater Comments
The speaker does a fairly good job of explaining substitute goods and their effect on demand, but she runs out of time before she can finish talking about complement goods. She also never mentions the examples the professor gave. If she had not included an unnecessary introduction at the beginning—explaining that the professor is talking about economic theory in an economics class—she would have had a bit more time to finish discussing what the prompt required. Her speech also contains many hesitations, so listeners have to make an effort to follow her ideas. In addition, her response contains numerous minor grammatical errors, such as " one goods," "substitute of another ," and " the two good ." [听力原文]