2026年2月托福机经套卷(第6套)Listen to an Academic Talk4 道题

Listen to an Academic Talk

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What aspect of nanotechnology does the speaker mainly address?

AIts impact on the natural environment

BIts potential to improve standards of living

CIts original discovery and evolution as a field of study

DIts useful applications and possible problems

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正确答案：D

Why does the speaker mention drug delivery systems?

ATo give an example of a limitation of nanotechnology

BTo describe the first medical breakthrough using nanotechnology

CTo suggest that medical professionals are eager to embrace nanotechnology

DTo illustrate how nanotechnology is used in the field of medicine

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正确答案：D

What does the speaker suggest about batteries made using nanotechnology?

AThey are more efficient than traditional batteries.

BThey can be manufactured more cost-effectively than traditional batteries.

CThey are created primarily for storing renewable energy sources.

DThey will likely be the only batteries available to consumers in the near future.

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正确答案：A

What does the speaker say is a potential drawback to nanotechnology?

AThe high cost of manufacturing using nanomaterials

BThe inherent difficulty in working with material that is so small

CThe ease with which nanoparticles can enter biological systems

DThe health risks associated with working with nanotechnology

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正确答案：C