根据听到的对话，回答题：What is the hydrologic cycle?-考呗网题库移动版

不定项选择题根据听到的对话，回答题：
What is the hydrologic cycle?

参考答案B

解析:

不定项选择题Identify the area in the diagram that mainly concerns climatologists．

不定项选择题What do hydrologists mainly study?

不定项选择题What happens to water that falls to the earth as precipitation?