2026年6月托福机经套卷(第4套)Listen to an Academic Talk / 24 道题

Listen to an Academic Talk / 2

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What is the talk mainly about?

AThe complex relationship among different types of viruses

BThe role of the microbiome in influencing human health

CThe historical context of microbiome research

DThe discovery of a new species of fungi

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正确答案：B

Why does the speaker mention mood swings experienced after eating?

ATo introduce what may be a surprising idea about the microbiome

BTo argue for the necessity of nutrient-rich diets for participants of microbiome studies

CTo highlight the main challenge in achieving mood regulation through diet

DTo summarize the focus of his recent research study

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正确答案：A

What does the speaker say about serotonin?

AIt typically decreases when a microbiome becomes more diverse.

BIt is a neurotransmitter that can be synthesized by the microbiome.

CIt often increases during the digestion of a meal.

DIt acts as a defense mechanism for the immune system.

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正确答案：B

What does the speaker imply about the future of medicine?

AMicroscopic inhabitants will likely be ignored in future treatments.

BPersonalized medicine may be influenced by individual microbiome profiles.

CTraditional medications will overshadow probiotic-based therapies.

DMood regulation will be the primary focus of microbiome-related advancements.

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正确答案：B