Listen to an Academic Talk
Listening剩余 3 次免费测试
Listen to a short academic talk and answer questions about main ideas and details
6 套免费测试 · 每套约 12 分钟
选择测试 (6 可用)
- 1练习测试 1Biology: Batesian and Mullerian mimicry未开始约 12 分钟
- 2练习测试 2Geology: how oxbow lakes form未开始约 12 分钟
- 3练习测试 3Psychology: the serial position effect未开始约 12 分钟
- 4练习测试 4Art history: the fresco painting technique未开始约 12 分钟
- 5练习测试 5Astronomy: tidal locking and the Moon未开始约 12 分钟
- 6练习测试 6Linguistics: pidgins and creoles未开始约 12 分钟
预览练习测试 1的题目
这是本测试的全部题目。开始练习测试即可作答并核对答案。
Listen to an Academic Talk
Listen to part of a talk in a class. Then answer the questions. You will hear the talk only once.
1. What is the talk mainly about?
- A. How animals produce toxins to defend themselves
- B. Two ways species benefit from looking like other species
- C. Why birds prefer to eat certain kinds of butterflies
- D. How snakes developed their bright warning colors
2. According to the professor, what can happen if Batesian mimics become too common?
- A. The mimics begin producing their own toxins.
- B. The harmful species changes its color pattern.
- C. Predators stop hunting both the mimics and the models.
- D. Predators stop treating the warning pattern as a danger signal.
3. Why does the professor discuss the viceroy butterfly?
- A. To show that an accepted example was changed after testing
- B. To give a clear example of a harmless Batesian mimic
- C. To explain how monarch butterflies became toxic
- D. To compare butterflies with the kingsnake and coral snake
4. What can be inferred about Mullerian mimicry?
- A. It works only when one species is much rarer than the other.
- B. It was discovered before Batesian mimicry.
- C. It benefits every species that shares the pattern.
- D. It mainly occurs among harmless species.
关于此题型
Listen to a short academic talk and answer questions about main ideas and details
Listen and answer multiple-choice questions about gist and detail