2026年7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 does the speaker mainly discuss?

AThe reasons that skyscrapers have been built taller over time

BThe combination of two materials to build strong structures

CThe processes used to make different building materials

DThe best and worst options for construction materials

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正确答案：B

Why does the speaker mention a grocery bag?

ATo compare the weights of concrete and steel

BTo explain why concrete can become squeezed

CTo illustrate what happens when tensile strength is absent

DTo point out a difference between paper and plastic

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正确答案：C

What does the speaker say about temperature variations?

AThey improve the strength of reinforced concrete.

BThey worsen the effect of salt on buildings.

CConcrete and steel react to them in similar ways.

DIf they are extreme, cracks in buildings will form.

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正确答案：C

What does the speaker imply about stainless steel and fiberglass?

AThey may be better than reinforced concrete in coastal areas.

BThey may work together to improve resistance to environmental factors.

CThey are simpler to produce than reinforced concrete.

DThey tend to corrode in a similar way as reinforced concrete does.

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正确答案：A