2026年3月托福机经套卷(第2套)Listen to an Academic Talk4 道题

Listen to an Academic Talk

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Why does the speaker discuss the Kuiper Belt at the beginning of the talk?

ATo explain why Pluto's status changed

BTo illustrate Pluto's size

CTo emphasize how far Pluto is from the Sun

DTo make a point about Pluto's shape

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正确答案：A

How did new data change scientists' understanding of Pluto?

AIt has a longer orbit than previously thought.

BIt has a wider variety of features than previously thought.

CIt used to be larger in the past than previously thought.

DIt has larger amounts of rainfall than previously thought.

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正确答案：B

What point does the speaker make about convection in Pluto's ice basin?

AIt is making the surface of the ice basin grow larger.

BIt suggests that volcanoes exist on Pluto.

CIt continuously moves warmer ice to the basin's surface.

DIt creates strong winds that blow across Pluto's surface.

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正确答案：C

According to the speaker, what could the presence of an ocean on Pluto mean?

APluto orbits closer to the Sun than expected.

BA huge amount of salt exists throughout Pluto.

CObjects in the Kuiper Belt could support life.

DPluto's ice might be melting.

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正确答案：C