“思想道德与法治”是一门融()、实践性于一体的思想政治理论课。
A. 思想性
B. 政治性
C. 科学性
D. 理论性
The ratio of wave height to the wave length is called __________________. If this ratio exceeds ________________, the wave breaks, because the wave is too steep to support itself.
Deep-water waves move at speeds controlled by ____________________; Shallow-water waves move at speeds controlled by ______________________.
The restoring force of surface gravity wave is _______________.