23. The northern lights is essentially
(A) a discharge of electromagnetism from charged particles.
(B) a discharge of protons and electrons from the sun.
(C) a discharge of light from atoms.
(D) a parting of the earth’s magnetic field.
私人筆記 (共 2 筆)
未解鎖
一個最令人驚嘆的自然現象是北極光或極光...
未解鎖
The northern lights...
阿摩線上測驗
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