問題詳情

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.

參考答案

答案:C
難度:非常簡單1
統計:A(0),B(0),C(7),D(0),E(0)

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