单项选择题

Questions 11-13 are based on the following passage about a science project. You now have 15 seconds to read the questions 11-13. Why do scientists plan to transmit waves through the Pacific Ocean

A．To measure the effects of loud noises.
B．To take earth’s temperature.
C．To analyze the speed of sound.
D．To help the researchers.

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单项选择题

单项选择题

Questions 11-13 are based on the following passage about a science project. You now have 15 seconds to read the questions 11-13. Why do scientists plan to transmit waves through the Pacific Ocean 您的浏览器不支持 audio 元素。