2026年4月托福机经套卷(第2套)Listen to an Academic Talk / 24 道题

Listen to an Academic Talk / 2

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共用录音 1

What is the main topic of the talk?

AThe benefits of coral reef ecosystems

BThe behavior of fish in marine environments

CThe causes and effects of ocean acidification

DThe role of renewable energy in ocean science

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正确答案：C

According to the speaker, what challenge are shell-building organisms facing?

AThey have difficulty preserving their physical structures.

BThey need to search for calcium-rich food sources.

CThey must migrate to escape acidic conditions.

DTheir shells are growing larger than usual.

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正确答案：A

According to the speaker, what is one effect of changes in ocean chemistry on clown fish?

AThey migrate to colder regions of the ocean.

BThey become more aggressive towards each other.

CThey lose the ability to regulate body temperature.

DThey have difficulty perceiving their surroundings.

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正确答案：D

Why does the speaker mention mangroves?

ATo identify organisms most vulnerable to acidification

BTo explain a way to mitigate acidification

CTo describe symbiotic relationships in marine ecosystems

DTo highlight the importance of marine biodiversity

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正确答案：B