Scientists are concerned about why natural phenomena of which some often impress heavy calamities on man occur.
举一反三
- Which of the phenomena may not occur if there is an energy crisis?
- Natural calamities include heavy weather, thunder storm and lightening, flood, earthquake and fire etc. A: 正确 B: 错误
- 中国大学MOOC: Natural calamities include heavy weather, thunder storm and lightening, flood, earthquake and fire etc.
- Natural calamities covered by insurance are events that are exceptional to some extent, not the ordinary action of the wind and waves.
- Some phenomena related to grass are often used to describe the transiency of human life.