❓ 题目 According to the passage, what is the main significance of the concept of deep time?
- A. A. It proves that geological processes are solely catastrophic in nature.
- B. B. It provides a framework for understanding the slow and vast timescales of Earth's history.
- C. C. It suggests that the Grand Canyon is the oldest geological feature on Earth.
- D. D. It demonstrates that human history is longer than geological history.