2026年2月托福机经套卷(第1套)Listen to an Academic Talk4 道题

Listen to an Academic Talk

共用材料

共用录音 1

What is the speaker mainly discussing?

AUnusual sounds made by migrating whales

BMysterious sounds recorded in the deep ocean

CThe effects of human-generated noise on whales

DHow earthquakes create sound waves in the ocean

查看答案

正确答案：B

What does the term "upsweep" refer to?

AA method of collecting data underwater

BThe shape of an area on the ocean floor

CA sound with particular characteristics

DThe migration pattern of some whales

查看答案

正确答案：C

At first, what did scientists believe was the source of the mysterious tones they recorded?

AWhale songs

BShips' engines

CEarthquakes

DVolcanoes

查看答案

正确答案：A

Why does the speaker mention "inferred volcanic seismic activity"?

ATo imply that earthquakes cause upsweep

BTo clarify why more data about upsweep is needed

CTo suggest that one theory about upsweep is wrong

DTo explain a possible origin of upsweep

查看答案

正确答案：D