Narrator: Listen to part of a lecture in a biology class.
Professor: So, we've been discussing how animals adapt to their environments. Today, let's talk about a fascinating example: the Arctic fox. This small mammal lives in the tundra, where temperatures can drop to minus fifty degrees Celsius. To survive, the Arctic fox has several remarkable adaptations. First, its fur changes color with the seasons—white in winter to blend with snow, and brown in summer to match the rocks and plants. This is a form of camouflage. But there's more. The fox's body shape is compact, with short ears and a short muzzle, which reduces surface area and minimizes heat loss. Also, its paws are covered with thick fur, allowing it to walk on ice without freezing. Interestingly, the fox also has a countercurrent heat exchange system in its legs. Warm blood from the body heats the cooler blood returning from the paws, which keeps the core warm while the paws stay cool. This prevents excessive heat loss. So, in essence, the Arctic fox is a master of thermal regulation. Now, can anyone think of a potential challenge this fox might face if the climate warms?
❓ Вопрос What is the main topic of the lecture?
A. A. The hunting habits of the Arctic fox
B. B. The physical adaptations of the Arctic fox to cold environments
C. C. The migration patterns of Arctic animals
D. D. The diet of the Arctic fox in summer
✅ Правильный ответ
B. The physical adaptations of the Arctic fox to cold environments
TOEFL Listening Tips
Skim the questions first to predict the content
Watch for signal words in lectures and conversations (however, actually, in fact)
For main idea questions, focus on the beginning; for detail questions, focus on examples and data
For attitude questions, pay attention to the speaker's tone and word choice
Take notes on keywords; don't try to write down every word
