What structural role does the analogy 'It's like a teacher splitting students' play in the passage?
答案解析
**Core Concept:** Writing techniques (analogy function).
**Key Analysis:**
- Analogies **B. illustrate concepts** through comparison.
- **A/C/D** describe other rhetorical functions (refuting, concluding, data).
**Common Mistake:** Confusing analogy with counterargument.
正确答案：B