2026年4月托福机经套卷(第1套)Listen to an Academic Talk4 道题

Listen to an Academic Talk

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What assumption did Sagan and Morowitz challenge?

AThat the surface of Venus is too hot for life

BThat Venus' clouds are highly acidic

CThat extraterrestrial life must use sunlight for energy

DThat extraterrestrial life might exist only on certain types of planets

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正确答案：D

What does the speaker imply about the temperatures in the upper cloud layers of Venus?

AThey are much cooler than on the surface of Venus.

BThey are much hotter than on the surface of Earth.

CThey are influenced by chemical reactions in the clouds.

DThey vary significantly over time.

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正确答案：A

What does the speaker point out about microbes in Yellowstone National Park?

AThey would not survive on Venus.

BThey depend on sunlight for energy.

CThey can be harmful for other life.

DThey thrive in very harsh conditions.

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正确答案：D

At the end of the talk, the speaker emphasized that many planets do not have

Aclouds

Bgeothermal energy

Cliquid water

Da solid surface

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正确答案：D