2026年7月托福机经套卷(第1套)Listen to an Academic Talk / 24 道题

Listen to an Academic Talk / 2

共用材料

共用录音 1

What aspect of marine snow does the speaker mainly discuss?

AIts effects on the atmosphere and ocean life

BThe way it was discovered

CThe processes that produce it

DHow global warming has affected it

查看答案

正确答案：A

According to the speaker, what did people before the mid-1800s believe about the deep ocean floor?

AThat there were no living organisms there

BThat seawater froze in the cold, high-pressure conditions there

CThat only simple, one-celled organisms could survive there

DThat it was inhabited mainly by creatures like starfish and corals

查看答案

正确答案：A

What does the speaker say that marine snow is made of?

AIce particles and salt

BOrganic matter

CMicroorganisms that thrive near the ocean floor

DDissolved gases

查看答案

正确答案：B

According to the speaker, how does marine snow help regulate Earth’s climate?

ABy slowing the movement of ocean water

BBy lowering temperatures in deep ocean water

CBy transporting carbon to the seafloor

DBy causing phytoplankton to produce oxygen

查看答案

正确答案：C