单项选择题

Questions 4 to 7 are based on the following conversation. At the end of the conversation, you will be given 20 seconds to answer the questions. Now listen to the conversation. According to the woman, where are the hydrothermal vents found

A．In caves.
B．On the ocean floor.
C．Far below the Earth’s crust.
D．Inside archaea.

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单项选择题

单项选择题

Questions 4 to 7 are based on the following conversation. At the end of the conversation, you will be given 20 seconds to answer the questions. Now listen to the conversation. According to the woman, where are the hydrothermal vents found 您的浏览器不支持 audio 元素。