OG2 阅读 Q52

Choice A is the best answer. In lines 7-9("hidden...below"), the author notes that internal waves are “fundamental parts of ocean water dynamics” because they transfer “heat to the ocean depths and brin[g] up cold water from below.” The graph shows an internal wave forcing the warm isotherms to depths that typically are colder. For example, at 13:12, the internal wave transfers “heat to the ocean depths” by forcing the 10°C, 11°C, and 13°C isotherms to depths that typically are colder.
Choices B, C, and D are incorrect because the graph does not show how internal waves affect the ocean’s density, surface temperature, or tide flow.