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Question 3 of 6
What explanation does the professor give for the constant occurrence of VLF emissions on Earth?

A.

At any given time, some part of the world is experiencing sunrise or sunset

B.

Waveguides constantly form in the atmosphere

C.

Earth's magnetosphere directs interplanetary waves toward Earth's surface

D.

Lightning occurs constantly on the planet

我的答案:

正确答案:D

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