C 3) Our knowledge of the earth's interior has been gained mainly by: a) drilling deep exploration wells b) excavating deep mine shafts c) studying the behavior of seismic waves d) observing volcanic eruptions iwa
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Home » Geography » C 3) Our knowledge of the earth's interior has been gained mainly by: a) drilling deep exploration wells b) excavating deep mine shafts c) studying the behavior of seismic waves d) observing volcanic eruptions iwa