中国石油大学 / 中石油
正确率:100%
5. 1. In __________, effect on the earth’s electric field of variations in the conductivity and/or permittivity of subsurface rocks are measured.
A、gravity surveys
B、magnetic surveys
C、Electric surveys
D、Radio-active surveys
A、gravity surveys
B、magnetic surveys
C、Electric surveys
D、Radio-active surveys
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