职称英语职称英语理工类2014年职称英语理工A真题
题目内容

The Northern Lights are createdwhen______

2024-07-09

A.atomic particles fall to the Earth and collidewith atmospheric gases.

B.the magnetic field lines fail toreconnect.

C.the electrons falling to the Earth shinein different colors.

D.oxygen and nitrogen are separated from theatmospheric gases.

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