In order to prevent the desturction of property caused by earhtquakes, what is a major concern in Para 2
举一反三
- what is the major thematic concern of Walden?
- What is the main concern of students when they choose a major?
- What is the major reason to prevent some people from being successful?
- n. something that is done in advance in order to prevent problems or to avoid danger A: profession B: precaution C: portrait D: property
- What is the main idea of part 2 (Para 4-6)?