Question: Radiation Exposure

Comment on Radiation Exposure

The first blank makes sense but i think i have a gap in my knowledge in understanding the relationship that relationship words produce. For example, i wouldn't jump to conclude that the blank following either should be the opposite of natural or was that known from context in the rest of the sentence?

greenlight-admin's picture

In the construction EITHER X OR Y, the two words are opposite (in most cases).

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