TPO41-L4
Exoplanet
- What do the speakers mainly discuss?
- A. Whether life could exist outside a star’s habitable zone
- B. Techniques used by researchers to detect exoplanets
- C. Exoplanets that share certain characteristics with Earth
- D. Characteristics of several recently discovered red dwarf stars
- What does the professor say about the host star Gliese 581?
[CHOOSE 2 ANSWERS]
- A. It is larger than the Sun.
- B. It is cooler than the Sun.
- C. It is a relatively young star.
- D. It is relatively close to Earth.
- What does the professor suggest about life on other planets?
- A. It most likely does not exist.
- B. It probably will not be discovered in the near future.
- C. It probably would not be similar to life on Earth.
- D. It could possibly be found even on gas giants.
- What did researchers discover about the planet Gliese 581d when they reexamined it?
- A. It is made entirely of rocks.
- B. It is not able to support an ocean.
- C. It is smaller than previously thought.
- D. It is closer to its host star than previously thought.
- Why is the planet Gliese 581e unlikely to support carbon-based life?
- A. It is too hot.
- B. It is too small.
- C. It is covered in ice.
- D. It is made entirely of gas.
- What does the professor find most exciting about the discovery of the planet Gliese 581e?
- A. It showed that some exoplanets have an atmosphere like Earth’s.
- B. It helped researchers better understand exoplanets’ orbits.
- C. It showed that the technology exists to detect small exoplanets.
- D. It proved that some stars’ habitable zones are larger than once thought.
答案：
C BD B D A C